Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884222 | Fire alarm system | Tetsuya Nagashima, Sadataka Yuchi, Akira Kitajima | 1989-11-28 |
| 4803469 | Fire alarm system | — | 1989-02-07 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884222 | Fire alarm system | Tetsuya Nagashima, Sadataka Yuchi, Akira Kitajima | 1989-11-28 |
| 4803469 | Fire alarm system | — | 1989-02-07 |