Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5064255 | Opening/closing device of a door member | Masayoshi Osaka, Mitsuo Tanaka, Masao Miyamoto, Tooru Hasegawa, Masuo Kamitaka +2 more | 1991-11-12 |
| 5052151 | Opening/closing device of a door member | — | 1991-10-01 |
| 4947583 | Opening/closing device of a door member | Masayoshi Osaka, Mitsuo Tanaka, Masao Miyamoto | 1990-08-14 |