Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5077782 | External analog loopback | Carl J. Bushue | 1991-12-31 |
| 4799153 | Method and apparatus for enhancing security of communications in a packet-switched data communications system | J. David Hann, James C. P. Lum | 1989-01-17 |