Issued Patents 1989
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868561 | Method of reprogramming an alert pattern | — | 1989-09-19 |
| 4862516 | System for automatically tuning the antenna of a miniature portable communications device | Philip P. Macnak, James S. Irwin | 1989-08-29 |
| 4860004 | Digital selective calling receiver having a selectively attachable device for multiple independent address decoding capability | — | 1989-08-22 |
| 4839628 | Paging receiver having selectively protected regions of memory | Mario A. Rivas, Kenneth R. Burch, Vincent B. Deems | 1989-06-13 |
| 4829466 | Paging device with modifiable operational characteristics | Kuppuswamy Raghunathan | 1989-05-09 |
| 4816820 | Radio communication receiver with apparatus for altering bit rate of the receiver | — | 1989-03-28 |
| 4811376 | Paging system using LPC speech encoding with an adaptive bit rate | Dakshesh D. Parikh | 1989-03-07 |