Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4677976 | Emergency mask | Tsuneyoshi Takase, Yoriyuki Hayashi | 1987-07-07 |
| D288731 | Canister-holding housing of emergency mask | — | 1987-03-10 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4677976 | Emergency mask | Tsuneyoshi Takase, Yoriyuki Hayashi | 1987-07-07 |
| D288731 | Canister-holding housing of emergency mask | — | 1987-03-10 |