Umehara; Masaakira
Patent Applications and Registrations
Patent applications and USPTO patent grants for Umehara; Masaakira.The latest application filed is for "optical information recording element".
- Umehara; Masaakira - Yokohama JP
- Umehara; Masaakira - Tokyo JP
| Patent | Date |
|---|---|
| Optical information recording element Grant 4,891,305 - Oba , et al. January 2, 1 | 1990-01-02 |
| Optical information recording medium Grant 4,767,693 - Oba , et al. August 30, 1 | 1988-08-30 |
| Optical information recording medium Grant 4,714,667 - Sato , et al. December 22, 1 | 1987-12-22 |
| Optical information recording medium Grant 4,707,431 - Umehara November 17, 1 | 1987-11-17 |
| Optical information recording medium Grant 4,696,892 - Abe , et al. September 29, 1 | 1987-09-29 |
| Optical information recording medium Grant 4,656,121 - Sato , et al. April 7, 1 | 1987-04-07 |
| Optical information recording medium Grant 4,465,767 - Oba , et al. August 14, 1 | 1984-08-14 |
| Optical information recording medium Grant 4,460,665 - Kunikane , et al. July 17, 1 | 1984-07-17 |
| Photo-sensitive and heat-sensitive composition and recording element using same Grant 4,332,884 - Uji-Ie , et al. June 1, 1 | 1982-06-01 |
| Color electrostatic copying machine Grant 4,162,843 - Inoue , et al. July 31, 1 | 1979-07-31 |
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