Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5193077 | Method and apparatus for improved seismic prospecting | Arthur B. Weiglein, Timothy H. Keho | 1993-03-09 |
| 4731846 | Voice messaging system with pitch tracking based on adaptively filtered LPC residual signal | George R. Doddington | 1988-03-15 |
| 4696038 | Voice messaging system with unified pitch and voice tracking | George R. Doddington | 1987-09-22 |