Ricerca semantica
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- Year 1942, n° US-2308810, applied in 1943, by Philip C. Hull. Desk set mounting.
- Year 1941, n° US-2328580, applied in 1943, by Milton R. Pickus. Ruthenium alloy pen point.
- Year 1941, n° US-2339079, applied in 1944, by Otto Jendresen. Apparatus for tipping metal bases with metal tips.
- Year 1942, n° US-2343991, applied in 1944, by David F. Mohns. Filling mechanism for fountain pens.
- Year 1944, n° US-2360297, applied in 1944, by Russell T. Wing. Fountain pen.
- Year 1943, n° US-2375770, applied in 1945, by Arthur O. Dahlberg. Fountain pen.
- Year 1943, n° US-2386500, applied in 1945, by Kenneth S. Parker. Desk set.
- Year 1944, n° US-2387001, applied in 1945, by Marlin S. Baker. Fountain pen.
- Year 1944, n° US-2392942, applied in 1946, by Lester W. Ormsby. Fountain pen cap construction.
- Year 1944, n° US-2398531, applied in 1946, by Philip C. Hull. Filling mechanism for fountain pens.
- Year 1944, n° US-2400768, applied in 1946, by David F. Mohns. Fountain pen.
- Year 1944, n° US-2403039, applied in 1946, by Marlin S. Baker. Fountain pen.
- Year 1944, n° US-2403083, applied in 1946, by Philip C. Hull. Desk set mounting.
- Year 1944, n° US-2404063, applied in 1946, by Emmett Healy. Fountain pen.
- Year 1944, n° US-2406330, applied in 1946, by Walter J. Heagney. Fountain pen filling unit.
- Year 1945, n° US-2417861, applied in 1947, by Arthur O. Dahlberg. Fountain pen.
- Year 1945, n° US-2427068, applied in 1947, by Robert W. Randolph. Ball-point writing instrument.
- Year 1945, n° US-2427069, applied in 1947, by Robert W. Randolph. Writing instrument.
- Year 1945, n° US-2428854, applied in 1947, by Robert W. Randolph. Writing instrument.
- Year 1945, n° US-2428863, applied in 1947, by Russell T. Wing. Fountain pen.
- Year 1945, n° US-2452504, applied in 1948, by Ivan D. Tefft. Writing instrument.
- Year 1946, n° US-2454086, applied in 1948, by Robert W. Randolph. Ball-point writing instrument.
- Year 1946, n° US-2462929, applied in 1949, by Harlan H. Zodtner. Fountain pen.
- Year 1945, n° US-2464104, applied in 1949, by Ivan D. Tefft. Fountain pen.
- Year 1945, n° US-2481874, applied in 1949, by Robert W. Randolph. Ball-point writing instrument.
- Year 1946, n° US-2483603, applied in 1949, by Russell T. Wing. Fountain pen.
- Year 1946, n° US-2484640, applied in 1949, by James A. Mustard. Mechanical pencil.
- Year 1946, n° US-2489463, applied in 1949, by William B. Reynolds. Stable blue writing ink and a dye therefor.
- Year 1945, n° US-2503043, applied in 1950, by Robert Gruen. Pen desk set.
- Year 1946, n° US-2503061, applied in 1950, by Laszlo Moholy-Nagy. Pen desk set.
- Year 1946, n° US-2503080, applied in 1950, by Ivan D. Tefft, Marlin S. Baker. Mechanical pencil with push-button type lead feeding means.
- Year 1947, n° US-2504420, applied in 1950, by Philip C. Hull, George W. Gilman. Magazine pencil with rotary lead propelling means.
- Year 1945, n° US-2506035, applied in 1950, by Kenneth S. Parker. Writing instrument.
- Year 1946, n° US-2509465, applied in 1950, by Russell T. Wing. Dual-well fountain pen.
- Year 1945, n° US-2510634, applied in 1950, by Philip C. Hull. Magnetic desk set.
- Year 1945, n° US-2510648, applied in 1950, by Laszlo Moholy-Nagy. Pen desk set.
- Year 1945, n° US-2512004, applied in 1950, by Russell T. Wing. Fountain pen.
- Year 1945, n° US-2522553, applied in 1950, by Frederick R. Wittnebert. Fountain pen.
- Year 1947, n° US-2522554, applied in 1950, by Harlan H. Zodtner. Fountain pen.
- Year 1947, n° US-2522555, applied in 1950, by Floyd E. Bartell. Fountain pen.
- Year 1945, n° US-2528327, applied in 1950, by Marlin S. Baker. Fountain pen.
- Year 1948, n° US-2528328, applied in 1950, by Marlin S. Baker, Robert W. Randolph. Clutch mechanism for mechanical pencils.
- Year 1948, n° US-2528390, applied in 1950, by Galen H. Sayler. Writing inks.
- Year 1947, n° US-2528408, applied in 1950, by Harlan H. Zodtner. Fountain pen.
- Year 1948, n° US-2533082, applied in 1950, by Marlin S. Baker, Robert W. Randolph. Fountain pen cap.
- Year 1946, n° US-2554654, applied in 1951, by Frederick R. Wittnebert. Fountain pen.
- Year 1945, n° US-2561923, applied in 1951, by Edward B. Harmon. Fountain pen desk set.
- Year 1945, n° US-2580753, applied in 1952, by Herman C. Frentzel. Ball point fountain pen.
- Year 1945, n° US-2581739, applied in 1952, by Russell T. Wing. Fountain pen.
- Year 1946, n° US-2581740, applied in 1952, by Russell T. Wing. Fountain pen.