Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5172408 | Speakerphone state-controlled alerting arrangement | Norman W. Petty | 1992-12-15 |
| 4935954 | Automated message retrieval system | John S. Thompson | 1990-06-19 |
| D305537 | Communications workstation | Arthur H. Gilmore, Chris G. Johnson, Norman W. Petty, Barbara A. Seelye | 1990-01-16 |
| D305538 | Communications workstation | Arthur H. Gilmore, Chris G. Johnson, Norman W. Petty, Barbara A. Seelye | 1990-01-16 |
| D305423 | Communications workstation | Arthur H. Gilmore, Chris G. Johnson, Norman W. Petty, Barbara A. Seelye | 1990-01-09 |
| 4734931 | Integrated calling directory | James W. Bourg | 1988-03-29 |