Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4641337 | Key telephone system with means for operatively connecting another key telephone systems | Jouji Tanaka, Yoshiji Tanimoto, Minoru Okumura | 1987-02-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4641337 | Key telephone system with means for operatively connecting another key telephone systems | Jouji Tanaka, Yoshiji Tanimoto, Minoru Okumura | 1987-02-03 |