Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4333285 | Building structure | Hajime Koizumi, Kozo Toyama, Mikio Kobayashi, Hajime Hatano, Toshio Saeki +3 more | 1982-06-08 |
| 4211045 | Building structure | Hajime Koizumi, Kozo Toyama, Mikio Kobayashi, Hajime Hatano, Toshio Saeki +3 more | 1980-07-08 |