Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858272 | Door closing device | Kazuaki Ogawa | 1989-08-22 |
| 4825503 | Braking apparatus for door closer | Katsuhiko Okano | 1989-05-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858272 | Door closing device | Kazuaki Ogawa | 1989-08-22 |
| 4825503 | Braking apparatus for door closer | Katsuhiko Okano | 1989-05-02 |