Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4715146 | Apparatus for closing fireproof doors | Hisatugu Anzai, Noboru Kasahara | 1987-12-29 |
| 4656690 | Fireproof door closer and holder having a solenoid and a toggle mechanism | Fujio Katagiri, Hisatugu Anzai, Noboru Kasahara | 1987-04-14 |