Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4735068 | Card operated lock | Yoshiaki Katoh | 1988-04-05 |
| 4201069 | Knob for a door lock | Akira Katayama | 1980-05-06 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4735068 | Card operated lock | Yoshiaki Katoh | 1988-04-05 |
| 4201069 | Knob for a door lock | Akira Katayama | 1980-05-06 |