Ricerca semantica
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- Year 1952, n° US-2773479, applied in 1956, by Nolan Kent Rhoades. Fountain pen.
- Year 1952, n° US-D169456, applied in 1953, by Nolan Kent Rhoades. Pocket clip.
- Year 1952, n° US-2888908, applied in 1959, by Robert W. Randolph. Fountain pen.
- Year 1952, n° US-2699147, applied in 1955, by Nolan Kent Rhoades. Pen and pocket clip construction.
- Year 1953, n° US-2724367, applied in 1955, by Frederick R. Wittnebert. Fountain pens.
- Year 1953, n° US-2726639, applied in 1955, by Frederick R. Wittnebert. Fountain pen.
- Year 1953, n° US-2782763, applied in 1957, by Harlan H. Zodtner. Fountain pens.
- Year 1953, n° US-2916013, applied in 1959, by Nolan Kent Rhoades, Marlin S. Baker. Receptacle for receiving and enclosing the writing end of a fountain pen.
- Year 1954, n° US-2802450, applied in 1957, by Frederick R. Wittnebert. Fountain pens.
- Year 1954, n° US-2737927, applied in 1956, by Nolan Kent Rhoades. Fountain pen desk sets.
- Year 1955, n° US-D179425, applied in 1956, by Kenneth S. Parker. Closure cap for a writing instrument.
- Year 1956, n° US-D179053, applied in 1956, by Marlin S. Baker. Fountain pen.
- Year 1956, n° US-2871823, applied in 1959, by Marlin S. Baker. Fountain pen.
- Year 1957, n° US-2979030, applied in 1961, by William J. Harrington. Writing instruments.
- 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 1958, n° US-D191555, applied in 1961, by Kenneth Parker. Fountain pen.
- Year 1958, n° US-D185581, applied in 1959, by Clemens A. Sonntag, Lauren O. Main. Fountain pen nib.
- Year 1959, n° US-2935044, applied in 1960, by Frederick R. Wittnebert et al. Fountain pen.
- Year 1959, n° US-3087464, applied in 1963, by Frederick R. Wittnebert, Clemens A. Sonntag. Modular fountain pen.
- Year 1959, n° US-D188637, applied in 1960, by Homer T. Green. Writing instrument.