Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9953660 | System and method for reducing tandeming effects in a communication system | Qian-Yu Tang, Victor Zeyliger | 2018-04-24 |
| 4552994 | Apparatus for isolating the voice frequency path from the floating battery feed during signalling | Gregor D. McGibbon | 1985-11-12 |
| 4536614 | Supervision and dial pulse detection circuit for a telephone subscriber line | Gregor D. McGibbon | 1985-08-20 |