Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4521879 | Digital private branch exchange | Klaus Gueldenpfennig, William A. Oswald, Charles J. Breidenstein, Karam V. Narula | 1985-06-04 |
| 4363936 | Telephone network including common equipment with message information and control information circuits for connecting to stations having multifunction telephones | Ronald W. Christain, Uwe A. Pommerening, Barry Slingsby, Julian Wray West | 1982-12-14 |