Ricerca semantica
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- Year 1941, n° US-2328580, applied in 1943, by Milton R. Pickus. Ruthenium alloy pen point.
- Year 1942, n° US-2308810, applied in 1943, by Philip C. Hull. Desk set mounting.
- Year 1942, n° US-2343991, applied in 1944, by David F. Mohns. Filling mechanism for fountain pens.
- 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-2360297, applied in 1944, by Russell T. Wing. Fountain pen.
- Year 1944, n° US-2404063, applied in 1946, by Emmett Healy. Fountain pen.
- Year 1944, n° US-2392942, applied in 1946, by Lester W. Ormsby. Fountain pen cap construction.
- Year 1944, n° US-2387001, applied in 1945, by Marlin S. Baker. Fountain pen.
- Year 1944, n° US-2406330, applied in 1946, by Walter J. Heagney. Fountain pen filling unit.
- 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-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 1945, n° US-2417861, applied in 1947, by Arthur O. Dahlberg. Fountain pen.
- Year 1945, n° US-2512004, applied in 1950, by Russell T. Wing. Fountain pen.
- Year 1945, n° US-2581739, applied in 1952, by Russell T. Wing. Fountain pen.
- Year 1945, n° US-2506035, applied in 1950, by Kenneth S. Parker. Writing instrument.
- Year 1945, n° GB-642437, applied in 1950. Fountain pen.
- Year 1945, n° US-2522553, applied in 1950, by Frederick R. Wittnebert. Fountain pen.