Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888591 | Signal discrimination system | Alfred R. Koelle, David A. Eckhardt | 1989-12-19 |
| 4853705 | Beam powered antenna | — | 1989-08-01 |
| 4816839 | Transponder antenna | — | 1989-03-28 |
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888591 | Signal discrimination system | Alfred R. Koelle, David A. Eckhardt | 1989-12-19 |
| 4853705 | Beam powered antenna | — | 1989-08-01 |
| 4816839 | Transponder antenna | — | 1989-03-28 |