Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887311 | Radio with options board | Robert P. Dixon | 1989-12-12 |
| 4870699 | Method and apparatus for controlling the frequency of operation and at least one further variable operating parameter of a radio communications device | Ralph R. Sherman, Jr. | 1989-09-26 |