Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5953403 | Method for preventing call congestion on outgoing trunks of a local telephone exchange | Blake F. Lefort, R. Blair Lothian, Gary Bartholomew, Frankie Chun-Keung Tom | 1999-09-14 |