Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866513 | Color contrast correction system for video images obtained from color film | — | 1989-09-12 |
| 4830686 | Low yield ratio high-strength annealed steel sheet having good ductility and resistance to secondary cold-work embrittlement | Koichi Hashiguchi, Akio Tosaka, Toshio Irie | 1989-05-16 |
| 4817546 | Shirring control apparatus and method | Taishi Yokoyama, Masahiko Sato | 1989-04-04 |
| 4802017 | Device for recording image signals of photographic pictures | Takahiro Ohta | 1989-01-31 |
| 4800478 | Method and apparatus for controlling PWM inverter | — | 1989-01-24 |