Ricerca semantica
- Year 1927, n° US-1706923, applied in 1929. Feeder bar.
- Year 1927, n° US-1717001, applied in 1929, by Walter F. Benson. Clip and cap structure for fountain pens.
- Year 1929, n° US-1719895, applied in 1929, by Clinton E. Marshall. Clip.
- Year 1927, n° US-1720471, applied in 1929, by Rockel Alexander Fritsch. Attaching clip.
- Year 1928, n° US-1746065, applied in 1930, by Franklin A. Van Sant. Fountain-pen attachment.
- Year 1930, n° US-1783681, applied in 1930, by Owen R. Terry. Fountain-Pen refill indicator.
- Year 1928, n° US-1783734, applied in 1930, by Clinton E. Marshall. Fountain pen attachment.
- Year 1930, n° US-1794939, applied in 1931, by Alvin M. Yocom. Attachment for fountain pens.
- Year 1925, n° US-1809992, applied in 1931, by Oscar J. Sundstrand. Fountain pen.
- Year 1929, n° US-1811992, applied in 1931, by Benjamin R. Bell. Fountain pen.
- Year 1929, n° US-1818216, applied in 1931, by Oscar Federbusch. Fountain pen.
- Year 1929, n° US-1825090, applied in 1931, by Marion O. Reis. Combination pen cap and blotter.
- Year 1948, n° US-1890100, applied in 1954, by Harry Spiro. Fountain pen.
- Year 1929, n° US-1902573, applied in 1933, by Samuel A. Neidich. Method for forming tubes of celluloid and the like.
- Year 1930, n° US-1909795, applied in 1933, by Bjorn Andersen, Carsten Lyng. Coated cellulosic plastic.
- Year 1933, n° US-1931138, applied in 1933, by William A. Staff. Adjustable pencil holder.
- Year 1931, n° US-1940223, applied in 1933, by Lucifer J. Most. Method of producing seamless celluloid articles from bars of celluloid.
- Year 1934, n° US-1977527, applied in 1934, by Herman Pohle. Four color fountain pen.
- Year 1933, n° US-1986372, applied in 1935. Fountain pen.
- Year 1933, n° US-1988878, applied in 1935, by Emanuel J. Sonn. Fountain pen.
- Year 1933, n° US-1999966, applied in 1935, by José Andrés y Hernandez. Pencil clip.
- Year 1933, n° US-2011516, applied in 1935, by Hugo A. Funk. Fountain pen.
- Year 1935, n° US-2033164, applied in 1936, by George S. Walter. Writing pen.
- Year 1933, n° US-2051337, applied in 1936, by Andrew Stuart Horn. Improvements in or relating to Writing Points or Nibs.
- Year 1935, n° US-2075828, applied in 1937, by Archie D. Robinson. Pen.
- Year 1935, n° US-2093701, applied in 1937, by Jaroslav Zahel. Fountain pen.
- Year 1936, n° US-2108552, applied in 1938, by Arthur W. Schoneberger. Fountain pen.
- Year 1936, n° US-2149557, applied in 1939, by John A. Snodgrass. Fountain pen.
- Year 1940, n° US-2213931, applied in 1940, by Raymond S. Huss. Penholder.
- Year 1939, n° US-2219769, applied in 1940, by Robert S. Dorfman. Mechanical pencil.
- Year 1937, n° US-2224162, applied in 1940. Letter opener.
- Year 1940, n° US-2229749, applied in 1941, by Frank E. Little. Fountain pen.
- Year 1940, n° US-2233846, applied in 1941, by Eldie E. Packard. Fountain pen.
- Year 1940, n° US-2237155, applied in 1941, by Morris M. Malis. Clip and cap structure for fountain pens.
- Year 1940, n° US-2258030, applied in 1941, by John H. Oxley. Ink container.
- Year 1940, n° US-2260571, applied in 1941, by Glenn E. Johndohl. Fountain pen.
- Year 1940, n° US-2272674, applied in 1942, by Otto J. Kehr. Safety clasp.
- Year 1941, n° US-2279803, applied in 1942, by Aniceto R. Visitacion. Security clip.
- Year 1939, n° US-2293343, applied in 1942, by Doyle P. Jacobs. Mechanical pencil.
- Year 1942, n° US-2329996, applied in 1943, by Silio Lubrani. Fountain pen.
- Year 1944, n° US-2368425, applied in 1945, by Benjamin F. Reynolds. Fountain pen.
- Year 1944, n° US-2396058, applied in 1946, by Karl Rath. Marking pen.
- Year 1944, n° US-2409869, applied in 1946, by Joseph J. Kelley. Fountain pen.
- Year 1943, n° US-2418410, applied in 1947, by Denison B. Hull. Fastening device.
- Year 1946, n° US-2456602, applied in 1948, by James W. Welsh. Fountain pen.
- Year 1946, n° US-2472343, applied in 1949, by Anthony G. Rosa. Fountain pen.
- Year 1946, n° US-2498384, applied in 1950. Fountain pen.
- Year 1946, n° US-2531113, applied in 1950, by Wilbur Arthur Davis. Clip and cap structure for fountain pens.
- Year 1881, n° US-255205, applied in 1882, by Marvin C. Stone. Fountain pen-holder.
- Year 1948, n° US-2588015, applied in 1952, by Herman Kochendoerffer. Pen.