Ricerca semantica
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- Year 1916, n° US-1197224, applied in 1916, by William E. Moore. Clip for fountain-pens.
- Year 1914, n° US-1284525, applied in 1918, by Russell T. Wing. Fountain-pen.
- Year 1919, n° US-1346045, applied in 1920, by William E. Moore. Pressure-bar mechanism.
- Year 1920, n° US-1365463, applied in 1921, by Arthur O. Dahlberg. Fountain-pen indicator.
- Year 1921, n° US-1419026, applied in 1922, by Arthur O. Dahlberg. Fountain pen.
- Year 1921, n° US-1484683, applied in 1924, by Lewis M. Tebbel. Self-filling fountain pen.
- Year 1922, n° US-1486246, applied in 1924, by Oscar B. Hjorth. Fountain pen.
- Year 1923, n° US-1492451, applied in 1924, by Walter E. Guyot. Refill mechanism for fountain pens.
- Year 1922, n° US-1507729, applied in 1924, by Arthur O. Dahlberg. Fountain pen.
- Year 1926, n° US-1629987, applied in 1927, by Horace L. Blackman. Holder for fountain pens.
- Year 1921, n° US-1632371, applied in 1927, by George W. Gilman. Pencil.
- Year 1925, n° US-1634618, applied in 1927, by Oscar B. Hjorth. Fountain pen.
- Year 1922, n° US-1647093, applied in 1927, by Paul S. Hauton. Clip for pens, pencils, and the like.
- Year 1926, n° US-1669036, applied in 1928, by Horace L. Blackman, Oscar B. Hjorth. Pen-gripping device.
- Year 1926, n° US-1669040, applied in 1928, by William L. Cannif. Pen-gripping device.
- Year 1927, n° US-1674259, applied in 1928, by Bernard M. Palmer. Pencil gripper.
- Year 1927, n° US-1674260, applied in 1928, by Bernard M. Palmer. Pencil gripper.
- Year 1927, n° US-1674261, applied in 1928, by Bernard M. Palmer. Pencil gripper.
- Year 1926, n° US-1706662, applied in 1929, by Walter E. Guyot. Desk set.
- Year 1927, n° US-1720717, applied in 1929, by Amos F. Bumpus. Magazine pencil.
- Year 1929, n° US-1772000, applied in 1930, by Walter E. Guyot. Desk-set receptacle and gripper.
- Year 1928, n° US-1782597, applied in 1930, by Horace L. Blackman. Dispensing cabinet.
- Year 1929, n° US-1793610, applied in 1931, by Walter E. Guyot. Desk-set receptacle.
- Year 1929, n° US-1793824, applied in 1931, by Kenneth S. Parker. Fountain pen.
- Year 1929, n° US-1801635, applied in 1931, by William E. Moore. Fountain pen.
- Year 1929, n° US-1818743, applied in 1931, by Kenneth S. Parker. Adjustable feed for fountain pens.
- Year 1928, n° US-1819383, applied in 1931, by Kenneth S. Parker. Fountain pen.
- Year 1929, n° US-1821477, applied in 1931, by Kenneth S. Parker. Fountain pen.
- Year 1931, n° US-1853876, applied in 1932, by Kenneth S. Parker et al. Desk set mounting.
- Year 1930, n° US-1860093, applied in 1932, by Walter E. Guyot. Writing instrument receiving receptacle.
- Year 1930, n° US-1882780, applied in 1932, by Arthur O. Dahlberg. Fountain pen.
- Year 1930, n° US-1892145, applied in 1932, by Walter E. Guyot. Mechanical pencil.
- Year 1932, n° US-1892181, applied in 1932, by Ivan D. Tefft. Desk set structure.
- Year 1933, n° US-1904358, applied in 1933, by Arthur O. Dahlberg. Fountain pen.
- Year 1931, n° US-1916808, applied in 1932, by Kenneth S. Parker. Desk set.
- Year 1929, n° US-1917568, applied in 1933, by Benjamin F. Wupper. Fountain pen.
- Year 1931, n° US-1920770, applied in 1933, by Ivan D. Tefft, Kenneth S. Parker. Mechanical pencil.
- Year 1931, n° US-1932248, applied in 1933, by Carl S. Miner, Galen H. Sayler. Permanent quick drying writing fluid.
- Year 1932, n° US-1950364, applied in 1934, by William E. Moore. Fountain pen feed.
- Year 1931, n° US-1956084, applied in 1934, by Ivan D. Tefft. Desk set mounting.
- Year 1931, n° US-1972395, applied in 1934, by Galen H. Sayler. Permanent brilliantly colored writing fluid.
- Year 1932, n° US-1980508, applied in 1934, by Ivan D. Tefft. Fountain pen filling device.
- Year 1934, n° US-1985643, applied in 1934, by Carl Pfanstiehl. Fountain pen.
- Year 1934, n° US-1989351, applied in 1935, by Lucius A. Crowell. Fountain pen and other marking means.
- Year 1932, n° US-2016106, applied in 1935, by Arthur O. Dahlberg. Fountain pen.
- Year 1934, n° US-2031343, applied in 1936, by Ivan D. Tefft. Fountain pen.
- Year 1934, n° US-2035372, applied in 1936, by David F. Mohns. Fountain pen.
- Year 1934, n° US-2035378, applied in 1936, by Galen H. Sayler. Fountain pen.
- Year 1934, n° US-2037177, applied in 1936, by Nathan W. Paquette. Fountain pen.
- Year 1936, n° US-2096044, applied in 1937, by Roy B. Johns. Tube and method of forming the same.