Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5187806 | Apparatus and method for expanding cellular system capacity | Edward R. Johnson | 1993-02-16 |
| 4783843 | Split band filter for cellular mobile radio | Edward R. Johnson, Joseph F. Lutz | 1988-11-08 |