Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4647742 | Alternate on-off switch mechanism | Haruyuki Koizumi | 1987-03-03 |
| 4532393 | Push button switch | Haruyuki Koizumi, Hideki Sato | 1985-07-30 |
| 4495391 | Alternate on-off switch mechanism | Haruyuki Koizumi | 1985-01-22 |