Sonobe; Youji
Patent Applications and Registrations
Patent applications and USPTO patent grants for Sonobe; Youji.The latest application filed is for "optical amplifier evaluation method and optical amplifier evaluation device".
- Sonobe; Youji - Machida JP
- Sonobe; Youji - Tokyo JP
| Patent | Date |
|---|---|
| Optical amplifier evaluation method and optical amplifier evaluation device Grant 6,236,452 - Goto , et al. May 22, 2 | 2001-05-22 |
| Apparatus for measuring spectral power of a light beam Grant 4,758,086 - Sonobe , et al. July 19, 1 | 1988-07-19 |
| Driving circuit of a grating Grant 4,643,572 - Sonobe , et al. February 17, 1 | 1987-02-17 |
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