Ricerca semantica
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- 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.
- Year 1950, n° US-2587949, applied in 1952, by Harlan H. Zodtner. Fountain pen.
- Year 1948, n° US-2598171, applied in 1952, by Philip C. Hull. Nib for writing pens.
- Year 1948, n° US-2612867, applied in 1952, by Marlin S. Baker, Harlan H. Zodtner. Fountain pen.
- Year 1946, n° US-2619070, applied in 1952, by Marlin S. Baker. Ink feed and overflow collector means for fountain pens.
- Year 1948, n° US-2620774, applied in 1952, by James A. Mustard. Fountain pen.
- Year 1949, n° US-2628431, applied in 1953, by Dave Chapman. Fountain pen cleaning device.
- Year 1948, n° US-2645205, applied in 1953, by Robert W. Randolph. Fountain pen.
- Year 1948, n° US-2645206, applied in 1953, by David F. Mohns. Writing pen.
- Year 1950, n° US-2648309, applied in 1953, by Floyd E. Bartell. Fountain pen.
- Year 1947, n° US-2670711, applied in 1954, by Frederick R. Wittnebert. Fountain pen.
- Year 1946, n° US-2681041, applied in 1954, by Harlan H. Zodtner, James A. Mustard. Fountain pen.
- Year 1948, n° US-2684052, applied in 1954, by Ernest W. Rickmeyer. Writing instrument.
- Year 1952, n° US-2699147, applied in 1955, by Nolan Kent Rhoades. Pen and pocket clip construction.
- Year 1948, n° US-2702021, applied in 1955, by Ivan D. Tefft. Fountain pen.
- Year 1951, n° US-2708904, applied in 1955, by Nolan Kent Rhoades. Fountain pen desk set.
- Year 1948, n° US-2712299, applied in 1955, by Ernst W. Rickmeyer. Fountain pen.
- 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 1954, n° US-2737927, applied in 1956, by Nolan Kent Rhoades. Fountain pen desk sets.
- Year 1952, n° US-2773479, applied in 1956, by Nolan Kent Rhoades. Fountain pen.