Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5062131 | Telephone line monitoring circuit for providing a visual and auditory signal if the telephone line becomes inoperative | Kenneth Rehler | 1991-10-29 |
| 5056131 | Telephone line monitoring circuitry and apparatus | Kenneth Rehler | 1991-10-08 |
| 4969179 | Telephone line monitoring circuit for providing a visual and auditory signal if the telephone line becomes inoperative | Kenneth Rehler | 1990-11-06 |