Ricerca semantica
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- Year 1957, n° US-D185824, applied in 1959, by Warren B. Armstrong, Donald D. Furman. Finger grip for a writing instrument or the like.
- Year 1959, n° US-D188637, applied in 1960, by Homer T. Green. Writing instrument.
- Year 1958, n° US-D191555, applied in 1961, by Kenneth Parker. Fountain pen.
- Year 1960, n° US-D195385, applied in 1963, by Homer T. Green. Fountain pen nib.
- Year 1961, n° US-D196993, applied in 1963, by Homer T. Green. Writing instrument ink cartridge.
- Year 1961, n° US-D205872, applied in 1963, by Kenneth Parker. Writing instrument.
- Year 1970, n° US-D220663, applied in 1971, by Homer T. Green. Fountain pen nib.
- Year 1970, n° US-D223130, applied in 1972, by Homer T. Green. Fountain pen.
- Year 1977, n° US-D252464, applied in 1979, by Elmer D. Thompson, Martin E. Wachs. Fountain pen nib.