Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4736409 | Control data transmission system for private branch exchange | Hiroyuki Hasegawa, Masakazu Shirakawa | 1988-04-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4736409 | Control data transmission system for private branch exchange | Hiroyuki Hasegawa, Masakazu Shirakawa | 1988-04-05 |