Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5510859 | Tuned signal detector for use with a radio frequency receiver | Ralph G. Douglass | 1996-04-23 |
| 5404161 | Tuned signal detector for use with a radio frequency receiver | Ralph G. Douglass | 1995-04-04 |