Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4552994 | Apparatus for isolating the voice frequency path from the floating battery feed during signalling | Constantine V. Skidanenko | 1985-11-12 |
| 4536614 | Supervision and dial pulse detection circuit for a telephone subscriber line | Constantine V. Skidanenko | 1985-08-20 |
| 4511763 | Floating dc current source for a subscriber loop circuit | Constatine V. Skidanenko | 1985-04-16 |
| 4440979 | Current sink for DPT channel unit | Kenneth K. Yu | 1984-04-03 |