Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4423929 | Multi-layer display device | — | 1984-01-03 |
| 4321698 | Temperature compensated quartz wristwatch with memory stored predetermined temperature compensating data | Osamu Takeda | 1982-03-23 |