Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5333180 | Call message delivery system and method utilizing caller-selected system announcements | Percy B. Brown, Nga V. Chau, Tung-Hai Hsiao, Georg K. Karawas, Dawn R. Parrott +2 more | 1994-07-26 |
| 4972461 | Call message delivery system and method | Percy B. Brown, Nga V. Chau, Tung-Hai Hsiao, Georg K. Karawas, Dawn R. Parrott +2 more | 1990-11-20 |
| 4939771 | Attendant-controlled call message delivery system and method | Percy B. Brown, Nga V. Chau, A. R. Gore, Tung-Hai Hsiao, Georg K. Karawas +4 more | 1990-07-03 |
| 4932042 | Spontaneous voice and data messaging | Elliott Baral, Percy B. Brown, Reuben D. Hauptman, Richard J. Jaeger, Jr., Frank C. LaPorta +4 more | 1990-06-05 |