Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881240 | AM equalizer circuit for digital systems | David N. Critchlow, Graham M. Avis, Sandra J. K. Earlam, Karle J. Johnson, Bruce A. Smetana +2 more | 1989-11-14 |
| 4862107 | Frequency synthesizer for broadcast telephone system having multiple assignable frequency channels | — | 1989-08-29 |
| 4817089 | Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels | Mark J. Handzel, Steven A. Morley, Graham M. Avis | 1989-03-28 |