Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6788778 | Private branch exchange (PBX) system, private branch exchange, and method of communication using the same PBX system | — | 2004-09-07 |
YT
Yukichi Tatsumi
Overall (All Time): #3,489,579 of 4,157,543Top 85%
1
Patents All Time