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Patent applications and USPTO patent grants for Sakaoka; Gouji.The latest application filed is for "side knocking-type writing instrument".
Patent | Date |
---|---|
Side knocking-type writing instrument Grant 6,758,617 - Sakaoka July 6, 2 | 2004-07-06 |
Automatic mechanical pencil Grant 5,236,271 - Sakaoka August 17, 1 | 1993-08-17 |
Mechanical pencil Grant 4,729,684 - Sakaoka March 8, 1 | 1988-03-08 |
Mechanical pencil Grant 4,521,126 - Sakaoka , et al. June 4, 1 | 1985-06-04 |
Mechanical pencil or similar article Grant D269,189 - Sakaoka May 31, 1 | 1983-05-31 |
Casing for an eraser or the like Grant D260,532 - Sakaoka September 1, 1 | 1981-09-01 |
Mechanical pencil or similar article Grant D258,217 - Sakaoka February 10, 1 | 1981-02-10 |
Mechanical pencil having guides to match guides on a refill cartridge Grant 4,240,759 - Matsumoto , et al. December 23, 1 | 1980-12-23 |
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