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- Patent n° US-2223541, of 1940-12-03, requested on 1939-01-06, of Marlin S. Baker, The Parker Pen Company. Fountain pen.
- Patent n° US-2241865, of 1941-05-13, requested on 1939-12-28, of Lynn P. Martin, Herman K. Stempel, W. A. Sheaffer Pen Company. Fountain pen.
- Patent n° US-2255093, of 1941-09-09, requested on 1940-07-01, of George E. Ziegler, Wahl Eversharp. Fountain pen.
- Patent n° US-2282840, of 1942-05-12, requested on 1941-10-03, of Russell T. Wing, The Parker Pen Company. Fountain pen.
- Patent n° US-2283333, of 1942-05-19, requested on 1941-05-22, of Lynn P. Martin, W. A. Sheaffer Pen Company. Fountain pen.
- Patent n° US-2292381, of 1942-08-11, requested on 1940-12-24, of Henry C. Klagges, Esterbrook. Fountain pen feed.
- Patent n° US-2303373, of 1942-12-01, requested on 1941-11-03, of Lynn P. Martin, W. A. Sheaffer Pen Company. Fountain pen.
- Patent n° US-2316479, of 1943-04-13, requested on 1942-08-27, of Norman E. Weigel, Wearever. Fountain pen.
- Patent n° US-2328143, of 1943-08-31, requested on 1942-06-27, of Benjamin W. Hanle, Eagle. Fountain pen.
- Patent n° US-2337343, of 1943-12-21, requested on 1941-04-01, of John William Para, Wearever. Pen.
- Patent n° US-2375770, of 1945-05-15, requested on 1943-11-19, of Arthur O. Dahlberg, The Parker Pen Company. Fountain pen.
- Patent n° US-2380763, of 1945-07-31, requested on 1944-10-14, of David Juelss, Venus. Feed for fountain pens.
- Patent n° US-2398521, of 1946-04-16, requested on 1944-01-20, of George D. Cloutier, Wahl Eversharp. Fountain pen.
- Patent n° US-2410423, of 1946-11-05, requested on 1944-10-14, of Thomas F. Brinson, Scripto. Fountain pen.
- Patent n° US-2417861, of 1947-03-25, requested on 1945-01-09, of Arthur O. Dahlberg, The Parker Pen Company. Fountain pen.
- Patent n° US-2474996, of 1949-07-05, requested on 1945-10-12, of Frank B. Wallis, W. A. Sheaffer Pen Company. Fountain pen.
- Patent n° US-2489983, of 1949-11-29, requested on 1944-02-14, of Victor H. Severy, Scripto. Fountain pen.
- Patent n° US-2512004, of 1950-06-20, requested on 1945-03-05, of Russell T. Wing, The Parker Pen Company. Fountain pen.
- Patent n° US-2519966, of 1949-07-12, requested on 1946-06-11, of William F. Johnson, Mentmore. Fountain pen.
- Patent n° US-2548906, of 1951-04-17, requested on 1945-10-19, of John William Para, Wearever. Fountain pen.
- Patent n° US-2581739, of 1952-01-08, requested on 1945-03-05, of Russell T. Wing, The Parker Pen Company. Fountain pen.
- Patent n° US-2619070, of 1952-11-25, requested on 1946-09-19, of Marlin S. Baker, The Parker Pen Company. Ink feed and overflow collector means for fountain pens.
- Patent n° US-2620774, of 1952-12-09, requested on 1948-06-08, of James A. Mustard, The Parker Pen Company. Fountain pen.
- Patent n° US-2648309, of 1953-08-11, requested on 1950-09-23, of Floyd E. Bartell, The Parker Pen Company. Fountain pen.
- Patent n° US-2756722, of 1956-07-31, requested on 1952-05-08, of Josef C. Lamy, Lamy. Fountain pen structure.
- Patent n° US-2766728, of 1956-10-16, requested on 1950-07-15, of Theodor Kovacs, Günther Wagner - Pelikan. Fountain pen.
- Patent n° US-2766729, of 1956-10-16, requested on 1951-07-10, of Theodor Kovacs, Günther Wagner - Pelikan. Fountain pen.
- Patent n° US-2770221, of 1956-11-13, requested on 1951-03-29, of William Tonkowich, Waterman. Fountain pen.
- Patent n° US-2774333, of 1956-12-18, requested on 1950-12-19, of David Kahn, Wearever. Fountain pen with improved feed construction.
- Patent n° US-2881737, of 1959-04-14, requested on 1955-10-24, of Donald H. Young, Waterman. Fountain pen feed construction.
- Patent n° US-2935044, of 1960-05-03, requested on 1959-01-15, of Raymond L. Spaulding et al, The Parker Pen Company. Fountain pen.
- Patent n° US-293545, of 1884-02-12, requested on 1883-09-19, of Lewis E. Waterman, Waterman. Fountain-pen.
- Patent n° US-2935969, of 1960-05-10, requested on 1955-04-18, of Theodor Kovacs, Günther Wagner - Pelikan. Fountain pen with overflow chamber situated in the front part of the fountain pen body.
- Patent n° US-2983254, of 1961-05-09, requested on 1958-04-23, of Derrick John Silver, Mentmore. Fountain pens.
- Patent n° US-307735, of 1884-11-04, requested on 1883-06-20, of Lewis E. Waterman, Waterman. Fountain-pen.
- Patent n° US-314547, of 1885-03-24, requested on 1884-06-30, of William W. Stewart, Swan. Fountain-pen.
- Patent n° US-3154055, of 1964-10-27, requested on 1960-12-07, of Ray A. Lawton, The Parker Pen Company. Fountain pen.
- Patent n° US-345411, of 1886-07-13, requested on 1886-03-18, of Francis C. Brown, Caw's. Fountain-pen.
- Patent n° US-351033, of 1886-10-19, requested on 1886-08-23, of John A. Holland, John Holland Pen Company. Fountain-pen.
- Patent n° US-353053, of 1886-11-23, requested on 1886-04-20, of Dewitt C. Demarest, Eagle. Fountain-pen.
- Patent n° US-3532436, of 1970-10-06, requested on 1966-12-10, of Fritz König, Montblanc. Feed bar for Fountain Pens.
- Patent n° US-353399, of 1886-11-30, requested on 1886-08-18, of Francis C. Brown, David W. Beaumel, Caw's. Fountain-pen.
- Patent n° US-361493, of 1887-04-19, requested on 1886-11-06, of Dewitt C. Demarest, Eagle. Fountain-pen.
- Patent n° US-374140, of 1887-11-29, requested on 1887-04-15, of Francis C. Brown, Caw's. Fountain-pen.
- Patent n° US-378987, of 1888-03-06, requested on 1887-04-27, of William W. Stewart, Swan. Fountain-pen.
- Patent n° US-408000, of 1889-06-30, requested on 1888-11-23, of Dewitt C. Demarest, Eagle. Fountain-pen.
- Patent n° US-416944, of 1889-12-12, requested on 1888-12-04, of George S. Parker, The Parker Pen Company. Fountain pen.