Doi; Yoshikazu
Patent Applications and Registrations
Patent applications and USPTO patent grants for Doi; Yoshikazu.The latest application filed is for "objective optical system for endoscope".
- Doi; Yoshikazu - Ohmiya JP
- Doi; Yoshikazu - Omiya JP
- Doi; Yoshikazu - Saitama JP
- Doi; Yoshikazu - Yokohama JP
| Patent | Date |
|---|---|
| Objective optical system for endoscope Grant 4,598,980 - Doi , et al. July 8, 1 | 1986-07-08 |
| Wide angle zoom lens Grant 4,484,799 - Doi , et al. November 27, 1 | 1984-11-27 |
| Television camera system Grant 4,472,740 - Doi September 18, 1 | 1984-09-18 |
| Zoom lens system Grant 4,195,912 - Doi , et al. April 1, 1 | 1980-04-01 |
| Zoom lens system Grant 4,149,774 - Hirano , et al. April 17, 1 | 1979-04-17 |
| Microwave signal amplifier Grant 4,107,621 - Furutani , et al. August 15, 1 | 1978-08-15 |
| Zoom lens system Grant 3,961,845 - Doi , et al. June 8, 1 | 1976-06-08 |
| Projection lens system for motion picture projector Grant 3,951,524 - Doi , et al. April 20, 1 | 1976-04-20 |
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