Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4819753 | Functional evaluation device capable of evaluating an artificial device by the use of acoustic emission | Shigetomo Nunomura, Masashi Ono | 1989-04-11 |
| 4820910 | Security system and lock | Hiroshi Morimoto | 1989-04-11 |