Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5997212 | Cover for underground structures, body thereof and frame therefor | Hiroyoshi Takada, Junji Wada, Kyozo Sahara, Koji Terada | 1999-12-07 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5997212 | Cover for underground structures, body thereof and frame therefor | Hiroyoshi Takada, Junji Wada, Kyozo Sahara, Koji Terada | 1999-12-07 |