Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D303359 | Optical continuity testing transmitter | Max Kessler, Meyric K. Rogers, Robert Keith Southard | 1989-09-12 |
| 4800265 | Optical fiber continuity testing with pulsating optical test signal | Robert Keith Southard, William J. Stape | 1989-01-24 |
| 4797556 | Optical continuity testing apparatus with pulsating transmitter | Robert Keith Southard, William J. Stape | 1989-01-10 |