Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4523308 | Telephone concentrator switch arrangement | John W. Bull, Leon Croft, David B. DeVaney, Russell R. Davis, David L. Hinshaw +6 more | 1985-06-11 |
| 4366350 | Control system for telephone switching system | Wayne G. Smith, George C. Hanson | 1982-12-28 |
| 4276451 | Control system for telephone switching system | Otto W. Beebe, Richard I. Subrin, Barrie Brightman, George C. Hanson | 1981-06-30 |