Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5475741 | Telephone-entry system with electronic directory | William R. Davis, Richard P. Greenthal, Paul Szymanski, Ronald A. Wray, Richard A. Davidson | 1995-12-12 |
| 5252955 | Liquid-crystal display unit for electronic directory | William R. Davis, Richard P. Greenthal, Paul Szymanski, Ronald A. Wray, Richard A. Davidson | 1993-10-12 |
| 5027111 | Liquid-crystal display unit for electronic directory | William R. Davis, Richard P. Greenthal, Paul Szymanski, Ronald A. Wray, Richard A. Davidson | 1991-06-25 |