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| Patented in | Patent number | Priority date | Patent date | Invented by | Patent description | |
|---|---|---|---|---|---|---|
| Patent-US-1641846.pdf | US | 1641846 | 1925-01-16 | 1927-09-06 | Jules A. Fremon Avery S. De Haven | Costruzione stiloforo |
| Patent-US-1675543.pdf | US | 1675543 | 1926-09-17 | 1928-07-03 | Jules A. Fremon Avery S. De Haven | Costruzione stiloforo |
| Patent-US-1782109.pdf | US | 1782109 | 1926-09-17 | 1930-11-18 | Jules A. Fremon Avery S. De Haven | Base stiloforo |
| Patent-GB-705613.pdf | GB | 705613 | 1951-05-01 | 1954-03-17 | Balthasar Götz | Penna a sfera |
| Patent-DE-900667.pdf | DE | 900667 | 1951-05-01 | 1953-12-28 | Balthasar Götz | Penna a sfera |
| Patent-US-827004.pdf | US | 827004 | 1905-10-28 | 1906-07-24 | Benjamin F. Flint | Sistema di caricamento |
| Patent-US-2669224.pdf | US | 2669224 | 1950-10-24 | 1954-02-16 | Benjamin F. Miessner | Pennino con divaricatore |
| Patent-US-2368425.pdf | US | 2368425 | 1944-03-04 | 1945-01-30 | Benjamin F. Reynolds | Caricamento a cartuccia |
| Patent-US-1917568.pdf | US | 1917568 | 1929-11-15 | 1933-07-11 | Benjamin F. Wupper | Sistema di caricamento |
| Patent-US-956895.pdf | US | 956895 | 1909-08-09 | 1910-05-03 | Benjamin Grieshaber | Caricamento bump filler |
| Patent-US-1702954.pdf | US | 1702954 | 1928-05-28 | 1929-02-19 | Benjamin J. Title | Fermaglio a molla |
| Patent-US-1811992.pdf | US | 1811992 | 1929-10-07 | 1931-06-30 | Benjamin R. Bell | Sistema di caricamento |
| Patent-US-2289963.pdf | US | 2289963 | 1940-10-24 | 1942-07-14 | Benjamin W. Hanle | Pennino intercambiabile |
| Patent-US-1622316.pdf | US | 1622316 | 1926-07-24 | 1927-03-29 | Benjamin W. Hanle | Montaggio fermaglio |
| Patent-US-1926852.pdf | US | 1926852 | 1932-05-31 | 1933-09-12 | Benjamin W. Hanle | Montaggio fermaglio |
| Patent-US-2059577.pdf | US | 2059577 | 1934-04-28 | 1936-11-03 | Benjamin W. Hanle | Penna in celluloide |
| Patent-US-2105189.pdf | US | 2105189 | 1935-08-13 | 1938-01-11 | Benjamin W. Hanle | Compensatore pressione |
| Patent-US-2133617.pdf | US | 2133617 | 1937-03-11 | 1938-10-18 | Benjamin W. Hanle | Caricamento a pulsante di fondo |
| Patent-US-2148236.pdf | US | 2148236 | 1936-05-23 | 1939-02-21 | Benjamin W. Hanle | Caricamento a siringa rovesciata |
| Patent-US-2170242.pdf | US | 2170242 | 1936-05-23 | 1939-08-22 | Benjamin W. Hanle | Caricamento a sfiatatoio |
| Patent-US-2225864.pdf | US | 2225864 | 1939-04-21 | 1940-12-24 | Benjamin W. Hanle | Sistema di caricamento |
| Patent-US-2263299.pdf | US | 2263299 | 1939-12-22 | 1941-11-18 | Benjamin W. Hanle | Caricamento a levetta |
| Patent-US-2328143.pdf | US | 2328143 | 1942-06-27 | 1943-08-31 | Benjamin W. Hanle | Alimentatore pennino coperto |
| Patent-US-2331606.pdf | US | 2331606 | 1942-05-14 | 1943-10-12 | Benjamin W. Hanle | Caricamento a siringa |
| Patent-US-2422351.pdf | US | 2422351 | 1944-12-23 | 1947-06-17 | Benjamin W. Hanle | Pennino intercambiabile |
| Patent-US-2022416.pdf | US | 2022416 | 1935-01-05 | 1935-11-26 | Benjamin W. Hanle | Montaggio fermaglio |
| Patent-US-D112283.pdf | US | D112283 | 1938-03-11 | 1938-11-22 | Benjamin W. Hanle | Decorazione del fusto |
| Patent-GB-190428533.pdf | GB | 190428533 | 1904-12-28 | 1905-10-26 | Benjamin William Warwick | Penna a stilo |
| Patent-FR-517248.pdf | FR | 517248 | 1920-06-16 | 1921-05-02 | Berchtold & Kunz | Tiralinee a serbatoio |
| Patent-US-1674259.pdf | US | 1674259 | 1927-04-06 | 1928-06-19 | Bernard M. Palmer | Bocchetta per matita meccanica |
| Patent-US-1674260.pdf | US | 1674260 | 1927-04-06 | 1928-06-19 | Bernard M. Palmer | Bocchetta per matita meccanica |
| Patent-US-1674261.pdf | US | 1674261 | 1927-04-06 | 1928-06-19 | Bernard M. Palmer | Bocchetta per matita meccanica |
| Patent-US-955475.pdf | US | 955475 | 1909-04-29 | 1910-04-19 | Bert Rentz | Sistema di caricamento |
| Patent-CH-264938.pdf | CH | 264938 | 1944-05-24 | 1949-11-15 | Biro-Patente Aktiengesellschaft | Penna a sfera |
| Patent-US-1909795.pdf | US | 1909795 | 1930-01-25 | 1933-05-16 | Bjorn Andersen Carsten Lyng | Rivestimento metallico |
| Patent-GB-1255389.pdf | GB | 1255389 | 1969-07-14 | 1971-12-01 | Brook Arthur Denis | Penna a sfera |
| Patent-US-1473701.pdf | US | 1473701 | 1922-06-14 | 1923-11-13 | Byron B. Goldsmith | Calamaio per inchiostro solubile |
| Patent-DE-273638.pdf | DE | 273638 | 1913-08-05 | 1914-05-05 | Cark Shicktanz | Penna a stilo |
| Patent-US-1507782.pdf | US | 1507782 | 1920-01-30 | 1924-09-09 | Carl F. Litts | Alimentatore |
| Patent-US-1985643.pdf | US | 1985643 | 1934-03-16 | 1934-12-25 | Carl Pfanstiehl | Caricamento Vacumatic |
| Patent-US-1932248.pdf | US | 1932248 | 1931-02-24 | 1933-10-24 | Carl S. Miner Galen H. Sayler | Inchiostro ad essiccazione rapida |
| Patent-US-1867932.pdf | US | 1867932 | 1927-04-13 | 1932-07-19 | John E. Wahl Carl W. Gronemann Arthur N. Lungren | Processo produttivo pennini |
| Patent-GB-190507113.pdf | GB | 190507113 | 1905-04-04 | 1905-12-21 | Cecil Bristow | Tasca portapenna |
| Patent-GB-190601860.pdf | GB | 190601860 | 1906-01-24 | 1906-10-18 | Cecil Bristow | Tasca portapenna |
| Patent-GB-190719977.pdf | GB | 190719977 | 1907-09-06 | 1908-06-04 | Cecil Bristow | Cappuccio reversibile a corpo della Longshort |
| Patent-FR-387824.pdf | FR | 387824 | 1908-03-04 | 1908-07-23 | Cecil Bristow | Cappuccio reversibile a corpo |
| Patent-GB-191203230.pdf | GB | 191203230 | 1912-02-08 | 1912-08-01 | Cecil Bristow | Penna a stilo |
| Patent-GB-191126950.pdf | GB | 191126950 | 1911-12-01 | 1912-08-15 | Cecil Bristow | Cappuccio |
| Patent-GB-191330070.pdf | GB | 191330070 | 1913-12-31 | 1914-10-01 | Cecil Bristow | Matita meccanica |
| Patent-GB-191400948.pdf | GB | 191400948 | 1914-01-13 | 1914-10-15 | Cecil Bristow | Blocco afflusso inchiostro |
| Patent-GB-191507408.pdf | GB | 191507408 | 1915-05-17 | 1916-01-20 | Cecil Bristow | Caricamento a levetta |
| Patent-GB-191516665.pdf | GB | 191516665 | 1915-11-25 | 1916-10-12 | Cecil Bristow | Sistema di caricamento |
| Patent-GB-101895.pdf | GB | 101895 | 1916-01-13 | 1916-11-02 | Cecil Bristow | Alimentatore |
| Patent-US-1243383.pdf | US | 1243383 | 1915-07-29 | 1917-10-16 | Cecil Bristow | Barra di pressione |
| Patent-US-851081.pdf | US | 851081 | 1905-08-03 | 1907-04-23 | Charles A. Faber | Sistema di caricamento |
| Patent-FR-377047.pdf | FR | 377047 | 1905-08-03 | 1907-08-27 | Charles A. Faber | Sistema di caricamento |
| Patent-US-1315373.pdf | US | 1315373 | 1918-10-26 | 1919-09-09 | Charles A. Luck | Montaggio gruppo pennino |
| Patent-US-1336572.pdf | US | 1336572 | 1919-05-21 | 1920-04-13 | Charles A. Luck | Rivestimento in metallo |
| Patent-US-1380109.pdf | US | 1380109 | 1919-01-22 | 1921-05-31 | Charles A. Luck | Corpo penna in metallo |
| Patent-US-1326206.pdf | US | 1326206 | 1919-05-21 | 1919-12-30 | Charles A. Luck | Cappuccio in metallo |
| Patent-FR-805654.pdf | FR | 805654 | 1935-03-09 | 1936-11-26 | Charles Abel | Fermaglio a molla |
| Patent-US-1359880.pdf | US | 1359880 | 1917-04-07 | 1920-11-23 | Charles Dunn | Caricamento tipo stantuffo tuffante |
| Patent-US-950939.pdf | US | 950939 | 1908-06-04 | 1910-03-01 | Clarence E. Martling Charles Dunn | Cappuccio a tenuta |
| Patent-US-826552.pdf | US | 826552 | 1905-07-03 | 1906-07-24 | Charles Dunn | Caricamento a siringa |
| Patent-US-821993.pdf | US | 821993 | 1905-06-30 | 1906-05-29 | Charles Dunn | Gruppo pennino doppio |
| Patent-GB-533420.pdf | GB | 533420 | 1939-11-06 | 1941-02-12 | Charles George Todd | Calamaio a inchiostro solido |
| Patent-GB-284412.pdf | GB | 284412 | 1926-11-01 | 1928-02-01 | Charles Gerald Stephens Frank Carr Fincham | Boccetta |
| Patent-US-1613811.pdf | US | 1613811 | 1924-05-02 | 1927-01-11 | Charles J. Funk | Lavorazione pennino |
| Patent-US-1735199.pdf | US | 1735199 | 1924-08-14 | 1929-11-12 | Charles J. Funk | Pennino intercambiabile |
| Patent-US-1485073.pdf | US | 1485073 | 1921-08-27 | 1924-02-26 | Charles J. Funk | Matita meccanica |
| Patent-US-2007576.pdf | US | 2007576 | 1934-02-23 | 1935-07-09 | Charles K. Lovejoy | Sistema di caricamento |
| Patent-US-2432112.pdf | US | 2432112 | 1945-04-12 | 1947-12-09 | Charles K. Lovejoy | Pennino e sezione Fingertip |
| Patent-US-D130356.pdf | US | D130356 | 1941-08-01 | 1941-11-11 | Charles K. Lovejoy | Corpo penna |
| Patent-US-D140697.pdf | US | D140697 | 1944-07-27 | 1945-03-27 | Charles K. Lovejoy | Fusto della Fingertip |
| Patent-US-D140696.pdf | US | D140696 | 1944-07-27 | 1945-03-27 | Charles K. Lovejoy | Sezione Fingertip |
| Patent-US-D140695.pdf | US | D140695 | 1944-07-27 | 1945-03-27 | Charles K. Lovejoy | Pennino Fingertip |
| Patent-US-2358091.pdf | US | 2358091 | 1944-01-22 | 1944-09-12 | Charles K. Lovejoy | Matita meccanica |
| Patent-US-D092817.pdf | US | D092817 | 1934-01-30 | 1934-07-17 | Charles K. Lovejoy | Fermaglio |
| Patent-US-2473689.pdf | US | 2473689 | 1945-01-24 | 1949-06-21 | Charles N. Colstad | Fermaglio a molla |
| Patent-US-1301057.pdf | US | 1301057 | 1918-05-02 | 1919-04-15 | Charles R. Keeran | Corpo in metallo |
| Patent-US-1694945.pdf | US | 1694945 | 1925-10-25 | 1928-12-11 | Charles R. Keeran | Matita meccanica |
| Patent-US-1351574.pdf | US | 1351574 | 1917-04-02 | 1920-08-31 | Charles R. Keeran | Caricamento a levetta |
| Patent-US-1351575.pdf | US | 1351575 | 1917-06-11 | 1920-08-31 | Charles R. Keeran | Caricamento tipo stantuffo tuffante |
| Patent-US-1130741.pdf | US | 1130741 | 1913-10-10 | 1915-03-09 | Charles R. Keeran | Matita meccanica |
| Patent-US-1151016.pdf | US | 1151016 | 1914-10-28 | 1915-08-24 | Charles R. Keeran | Matita meccanica |
| Patent-US-1989990.pdf | US | 1989990 | 1933-08-24 | 1935-02-05 | Charles R. Keeran | Sistema di caricamento |
| Patent-US-D049743.pdf | US | D049743 | 1916-04-04 | 1916-10-10 | Charles R. Keeran | Fermaglio |
| Patent-US-1360647.pdf | US | 1360647 | 1919-02-13 | 1920-11-30 | Charles R. Keeran | Corpo penna in metallo |
| Patent-FR-496693.pdf | FR | 496693 | 1919-03-07 | 1919-11-13 | Charles R. Keeran | Corpo in metallo |
| Patent-US-1426744.pdf | US | 1426744 | 1919-11-24 | 1922-08-22 | Charles R. Keeran Frank R. Taylor | Matita meccanica |
| Patent-US-1526365.pdf | US | 1526365 | 1923-05-14 | 1925-02-17 | Charles S. Nudelman | Combo stilo/matita |
| Patent-US-D147107.pdf | US | D147107 | 1946-04-06 | 1947-07-15 | Charles T. Breitenstein | Penna a sfera |
| Patent-US-1935010.pdf | US | 1935010 | 1928-02-29 | 1933-11-14 | Daniel V. Bowen Charles W. Douglas | Base stiloforo |
| Patent-US-D010872.pdf | US | D010872 | 1878-08-23 | 1878-10-22 | Charles W. Gessner | Portamine telescopico |
| Patent-DE-368070.pdf | DE | 368070 | 1920-02-24 | 1923-01-31 | Charlesworth Livsey | Caricamento rientrante |
| Patent-FR-531284.pdf | FR | 531284 | 1920-02-24 | 1922-01-10 | Charlesworth Livsey | Caricamento rientrante |
| Patent-FR-639313.pdf | FR | 639313 | 1927-08-11 | 1928-06-19 | Charlesworth Livsey | Caricamento rientrante |
| Patent-US-1577646.pdf | US | 1577646 | 1921-02-21 | 1926-03-23 | Charlesworth Livsey | Caricamento rientrante |
| Patent-FR-932296.pdf | FR | 932296 | 1945-07-06 | 1948-03-17 | Eric Ernest Samuel Wade Charlesworth Livsey | Caricamento a pulsante di fondo |
| Patent-US-2557710.pdf | US | 2557710 | 1948-05-07 | 1951-06-19 | Eric Ernest Samuel Wade Charlesworth Livsey | Fermaglio |
| Patent-FR-1060752.pdf | FR | 1060752 | 1947-02-21 | 1954-04-06 | Eric Ernest Samuel Wade Charlesworth Livsey | Fermaglio |
| Patent-FR-66402E.pdf | FR | 66402E | 1948-05-07 | 1957-02-27 | Eric Ernest Samuel Wade Charlesworth Livsey | Fermaglio |
| Patent-GB-679065.pdf | GB | 679065 | 1950-05-25 | 1952-09-10 | Eric Ernest Samuel Wade Charlesworth Livsey | Fermaglio |
| Patent-GB-621354.pdf | GB | 621354 | 1947-02-21 | 1949-04-07 | Eric Ernest Samuel Wade Charlesworth Livsey | Fermaglio |
| Patent-GB-636823.pdf | GB | 636823 | 1949-04-29 | 1950-05-10 | Eric Ernest Samuel Wade Charlesworth Livsey | Fermaglio |
| Patent-GB-595572.pdf | GB | 595572 | 1945-07-06 | 1947-12-09 | Eric Ernest Samuel Wade Charlesworth Livsey | Caricamento a pulsante di fondo |
| Patent-GB-336190.pdf | GB | 336190 | 1929-02-28 | 1930-10-09 | Claus Johannes Voss Christian Lausen Wilhelm Dziambor | Matita meccanica |
| Patent-GB-352184.pdf | GB | 352184 | 1929-09-04 | 1931-07-09 | Claus Johannes Voss Christian Lausen Wilhelm Dziambor | Caricamento push-knob |
| Patent-GB-302015.pdf | GB | 302015 | 1926-10-28 | 1928-12-13 | Paul Kohler Christian Schaefer | Matita meccanica |
| Patent-DE-824000.pdf | DE | 824000 | 1950-05-20 | 1951-12-06 | Christoph Kunkel | Caricamento a stantuffo |
| Patent-DE-807778.pdf | DE | 807778 | 1948-10-02 | 1951-07-05 | Christoph Kunkel | Costruzione sezione e cappuccio |
| Patent-DE-814119.pdf | DE | 814119 | 1948-12-22 | 1951-09-20 | Christoph Kunkel | Pennino intercambiabile |
| Patent-DE-829714.pdf | DE | 829714 | 1950-05-20 | 1952-01-28 | Christoph Kunkel | Cappuccio |
| Patent-US-2871825.pdf | US | 2871825 | 1956-01-18 | 1959-02-03 | Ryujiro Uchida Chuji Kurihara | Gruppo pennino e Switch filler |
| Patent-US-426758.pdf | US | 426758 | 1890-01-09 | 1890-04-29 | Claes W. Boman | Caricamento a cartuccia |
| Patent-US-648839.pdf | US | 648839 | 1900-03-10 | 1900-05-01 | Claes W. Boman | Alimentatore overfeed |
| Patent-US-1358511.pdf | US | 1358511 | 1920-05-07 | 1920-11-09 | Claes W. Boman | Montaggio fermaglio |
| Patent-US-632633.pdf | US | 632633 | 1899-06-27 | 1899-09-05 | Claes W. Boman | Penna a serbatoio estraibile |
| Patent-US-680117.pdf | US | 680117 | 1901-05-11 | 1901-08-06 | Claes W. Boman | Cappuccio a vite |
| Patent-US-785653.pdf | US | 785653 | 1904-12-21 | 1905-03-21 | Claes W. Boman | Sistema di caricamento |
| Patent-US-785654.pdf | US | 785654 | 1904-12-21 | 1905-03-21 | Claes W. Boman | Sistema di caricamento |
| Patent-US-907722.pdf | US | 907722 | 1908-07-01 | 1908-12-29 | Claes W. Boman | Penna rivestita in metallo |
| Patent-US-954415.pdf | US | 954415 | 1909-09-09 | 1910-04-12 | Claes W. Boman | Caricamento rientrante |
| Patent-US-1051670.pdf | US | 1051670 | 1912-06-10 | 1913-01-28 | Claes W. Boman | Caricamento sleeve filler |
| Patent-US-1051671.pdf | US | 1051671 | 1912-10-01 | 1913-01-28 | Claes W. Boman | Impugnatura sezione |
| Patent-US-1198994.pdf | US | 1198994 | 1916-06-29 | 1916-09-19 | Claes W. Boman | Sistema di caricamento |
| Patent-US-1205847.pdf | US | 1205847 | 1916-09-30 | 1916-11-21 | Claes W. Boman | Caricamento a levetta |
| Patent-US-1213725.pdf | US | 1213725 | 1916-10-18 | 1917-01-23 | Claes W. Boman | Caricamento spoon filler |
| Patent-US-1262438.pdf | US | 1262438 | 1918-02-18 | 1918-04-09 | Claes W. Boman | Caricamento tipo spoon filler |
| Patent-US-599592.pdf | US | 599592 | 1897-12-09 | 1898-02-22 | Claes W. Boman | Controllo alimentazione |
| Patent-US-610428.pdf | US | 610428 | 1898-06-30 | 1898-09-06 | Claes W. Boman | Alimentatore |
| Patent-US-599591.pdf | US | 599591 | 1897-10-11 | 1898-02-22 | Claes W. Boman | Costruzione fusto |
| Patent-US-599590.pdf | US | 599590 | 1897-10-11 | 1898-02-22 | Claes W. Boman | Costruzione fusto |
| Patent-US-1153754.pdf | US | 1153754 | 1915-06-11 | 1915-09-14 | Claes W. Boman | Montaggio clip |
| Patent-US-D059052.pdf | US | D059052 | 1921-05-25 | 1921-09-13 | John H. Worthy Clarence W. Lund | Motivo per guilloché, Hanlin |
| Patent-US-D127598.pdf | US | D127598 | 1940-11-29 | 1941-06-03 | Clark Gower | Portamatite |
| Patent-US-3087464.pdf | US | 3087464 | 1959-06-29 | 1963-04-30 | Frederick R. Wittnebert Clemens A. Sonntag | Costruzione modulare |
| Patent-US-D185581.pdf | US | D185581 | 1958-12-15 | 1959-06-23 | Clemens A. Sonntag Lauren O. Main | Pennino |
| Patent-US-1279821.pdf | US | 1279821 | 1918-05-08 | 1918-09-24 | Clements L. Argon | Sistema di caricamento |
| Patent-US-1508795.pdf | US | 1508795 | 1921-11-28 | 1924-09-16 | Clifford N. Johnson | Matita meccanica |
| Patent-US-1719895.pdf | US | 1719895 | 1929-01-15 | 1929-07-09 | Clinton E. Marshall | Fermaglio |
| Patent-US-1783734.pdf | US | 1783734 | 1928-11-24 | 1930-12-02 | Clinton E. Marshall | Sistema di caricamento |
| Patent-FR-857935.pdf | FR | 857935 | 1935-06-01 | 1940-10-05 | Compagnie des Encres | Sistema di caricamento |
| Patent-US-2784699.pdf | US | 2784699 | 1952-11-06 | 1957-03-12 | Craig R. Sheaffer | Snorkel a capillarità |
| Patent-US-1641829.pdf | US | 1641829 | 1924-12-29 | 1927-09-06 | Walter A. Sheaffer Craig R. Sheaffer | Costruzione stiloforo |
| Patent-US-1712850.pdf | US | 1712850 | 1921-11-23 | 1929-05-14 | Craig R. Sheaffer | Matita meccanica |
| Patent-US-1900669.pdf | US | 1900669 | 1929-04-01 | 1933-03-07 | Craig R. Sheaffer William R. Cuthbert | Matita meccanica |
| Patent-US-2110558.pdf | US | 2110558 | 1936-05-18 | 1938-03-08 | Craig R. Sheaffer | Blocco afflusso inchiostro |
| Patent-US-D078795.pdf | US | D078795 | 1928-11-21 | 1929-06-17 | Craig R. Sheaffer | Corpo della Balance |
| Patent-US-D078794.pdf | US | D078794 | 1928-11-21 | 1929-06-17 | Craig R. Sheaffer | Combo Balance |
| Patent-US-D099218.pdf | US | D099218 | 1935-10-19 | 1936-04-07 | Craig R. Sheaffer | Corpo penna della Balance |
| Patent-US-D092212.pdf | US | D092212 | 1934-02-05 | 1934-05-08 | Craig R. Sheaffer | Celluloide abalone |
| Patent-US-1807227.pdf | US | 1807227 | 1926-02-12 | 1931-05-26 | Craig R. Sheaffer | Bocchette stiloforo |
| Patent-US-D074242.pdf | US | D074242 | 1925-06-25 | 1928-01-10 | Walter A. Sheaffer Craig R. Sheaffer | Base stiloforo |
| Patent-GB-639958.pdf | GB | 639958 | 1947-10-29 | 1950-07-12 | Cyril George Barker | Decorazione corpo e cappuccio |
| Patent-US-D177560.pdf | US | D177560 | 1955-06-22 | 1956-05-01 | Robert H. Ensign Danforth Cardozo Jr. | Penna triangolare |
| Patent-US-D177369.pdf | US | D177369 | 1955-06-23 | 1956-04-10 | Robert H. Ensign Danforth Cardozo Jr. | Penna triangolare |
| Patent-US-1554517.pdf | US | 1554517 | 1925-02-12 | 1925-09-22 | Daniel A. O'Neill | Fermaglio aprilettera |
| Patent-US-1978675.pdf | US | 1978675 | 1934-02-09 | 1934-10-30 | Russel B. Kingman Daniel J. Mayer | Penna con inchiostro solubile |
| Patent-US-1842503.pdf | US | 1842503 | 1931-04-08 | 1932-01-26 | Daniel V. Bowen | Base stiloforo |
| Patent-US-1935011.pdf | US | 1935011 | 1931-04-08 | 1933-11-14 | Daniel V. Bowen | Base stiloforo |
| Patent-US-1708671.pdf | US | 1708671 | 1927-11-22 | 1929-04-09 | Daniel W. Hemming | Macchina per firme multiple |
| Patent-US-2628431.pdf | US | 2628431 | 1949-09-27 | 1953-02-17 | Dave Chapman | Attrezzatura pulizia penne |
| Patent-US-827022.pdf | US | 827022 | 1905-07-22 | 1906-07-24 | David B. Kaufmann | Sistema di caricamento |
| Patent-US-2400768.pdf | US | 2400768 | 1944-10-12 | 1946-05-21 | David F. Mohns | Compensazione pressione Parker 51 |
| Patent-US-2035372.pdf | US | 2035372 | 1934-09-08 | 1936-03-24 | David F. Mohns | Caricamento a siringa rovesciata |
| Patent-US-2343991.pdf | US | 2343991 | 1942-08-01 | 1944-03-14 | David F. Mohns | Caricamento vacumatic |
| Patent-US-2645206.pdf | US | 2645206 | 1948-06-04 | 1953-07-14 | David F. Mohns | Pennino tubolare |
| Patent-GB-283677.pdf | GB | 283677 | 1926-11-04 | 1928-01-19 | Alfred Finburgh David Finburgh Alexander Finburgh | Matita meccanica |
| Patent-GB-418734.pdf | GB | 418734 | 1934-07-19 | 1934-10-30 | David Finburgh | Sezione con pennino ed alimentatore a vite |
| Patent-GB-456888.pdf | GB | 456888 | 1936-07-22 | 1936-11-17 | David Finburgh Alec Finburgh Thomas Leslie Beeby | Testina pubblicitaria |
| Patent-GB-472380.pdf | GB | 472380 | 1937-03-02 | 1937-09-22 | David Finburgh Alec Finburgh | Matita meccanica |
| Patent-GB-666145.pdf | GB | 666145 | 1949-01-25 | 1952-02-06 | David Harrison | Pennino coperto |
| Patent-US-1669714.pdf | US | 1669714 | 1926-11-08 | 1928-05-15 | David J. La France | Caricamento a levetta |
| Patent-US-1854747.pdf | US | 1854747 | 1931-03-16 | 1932-04-19 | David J. La France | Montaggio fermaglio |
| Patent-US-1749037.pdf | US | 1749037 | 1928-03-01 | 1930-03-04 | David J. La France | Base stiloforo |
| Patent-US-1845293.pdf | US | 1845293 | 1929-12-20 | 1932-02-16 | David J. La France | Matita meccanica |
| Patent-US-1528379.pdf | US | 1528379 | 1924-02-29 | 1925-03-03 | David J. La France | Caricamento pneumatico |
| Patent-US-1209978.pdf | US | 1209978 | 1916-01-01 | 1916-12-26 | David J. La France | Caricamento a levetta |
| Patent-US-1340277.pdf | US | 1340277 | 1918-07-11 | 1920-05-18 | David J. La France William P. De Witt | Blocco afflusso inchiostro |
| Patent-US-1350412.pdf | US | 1350412 | 1918-09-13 | 1920-08-24 | David J. La France William P. De Witt | Fermaglio a molla |
| Patent-US-2188662.pdf | US | 2188662 | 1938-08-02 | 1940-01-30 | David J. La France | Caricamento a siringa rovesciata |
| Patent-US-1807415.pdf | US | 1807415 | 1930-03-15 | 1931-05-26 | David J. La France | Sezione con presa triangolare |
| Patent-US-1423603.pdf | US | 1423603 | 1919-10-02 | 1922-07-25 | David J. La France William P. De Witt | Matita meccanica |
| Patent-US-1434684.pdf | US | 1434684 | 1919-10-02 | 1922-11-07 | David J. La France William P. De Witt | Matita meccanica |
| Patent-US-1300849.pdf | US | 1300849 | 1918-05-10 | 1919-04-15 | David J. La France William P. De Witt | Blocco afflusso inchiostro |
| Patent-US-2396919.pdf | US | 2396919 | 1944-11-09 | 1946-03-19 | David Juelss | Pennino coperto |
| Patent-US-2380763.pdf | US | 2380763 | 1944-10-14 | 1945-07-31 | David Juelss | Alimentatore |
| Patent-US-2393251.pdf | US | 2393251 | 1944-12-27 | 1946-01-22 | David Juelss | Pennino coperto |
| Patent-US-D142170.pdf | US | D142170 | 1945-05-10 | 1945-08-14 | David Juelss | Sezione per stilografica |
| Patent-US-2110551.pdf | US | 2110551 | 1935-12-10 | 1938-03-08 | Robert E. Freidlein David Juelss | Matita meccanica |
| Patent-US-2239526.pdf | US | 2239526 | 1940-11-19 | 1941-04-22 | David Juelss | Gomma per matita meccanica |
| Patent-US-2393250.pdf | US | 2393250 | 1944-12-05 | 1946-01-22 | David Juelss | Gruppo pennino coperto |
| Patent-US-2241203.pdf | US | 2241203 | 1937-11-11 | 1941-05-06 | David Juelss Frank Drews | Macchina per fare mine |
| Patent-US-2349553.pdf | US | 2349553 | 1943-10-30 | 1944-05-23 | David Juelss | Matita meccanica |
| Patent-US-2365880.pdf | US | 2365880 | 1944-03-25 | 1944-12-26 | David Juelss | Matita meccanica/portamine |
| Patent-US-2473149.pdf | US | 2473149 | 1945-09-07 | 1949-06-14 | David Juelss | Matita meccanica |
| Patent-US-2811948.pdf | US | 2811948 | 1954-06-06 | 1957-11-05 | David Kahn Morris Levy | Pennino intercambiabile |
| Patent-US-D087524.pdf | US | D087524 | 1932-05-06 | 1932-08-09 | David Kahn | Corpo penna |
| Patent-US-D087525.pdf | US | D087525 | 1932-05-24 | 1932-08-09 | David Kahn | Matita meccanica |