Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5249223 | Call-load-control arrangement for an emergency-call-answering center | — | 1993-09-28 |
| 4924491 | Arrangement for obtaining information about abandoned calls | Merle F. Compton, Brian W. Walsh | 1990-05-08 |
| 4691346 | PBX integrity arrangement for maintaining the functional integrity of PBX communication devices and associated facilities | — | 1987-09-01 |
| 4682354 | Automatic call coverage for unattended PBX stations | — | 1987-07-21 |
| 4672654 | PBX security system for monitoring security guard tours | — | 1987-06-09 |
| 4468528 | Methods and apparatus for providing enhanced announcements in a telephone system | Carla F. Reece | 1984-08-28 |