Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6088362 | Key telephone system without common control | Robert Turnbull, David Westergaard, Bruce W. Yee, Michael J. Lucas, Alan D. Eyre | 2000-07-11 |
| 6072826 | Key telephone system without common control | Robert Turnbull, David Westergaard, Bruce W. Yee, Michael J. Lucas, Alan D. Eyre | 2000-06-06 |
| 6046995 | Key telephone system without common control | Robert Turnbull, David Westergaard, Bruce W. Yee, Michael J. Lucas, Alan D. Eyre | 2000-04-04 |
| 5844977 | On-hook customer premise equipment alerting signal detection | Stephen Kos | 1998-12-01 |
| 5787115 | Key telephone system without common control | Robert Turnbull, David Westergaard, Bruce W. Yee, Michael J. Lucas, Alan D. Eyre | 1998-07-28 |