Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4791662 | Controlling key-system groups from a distributed control switching system | David J. Ahnen, Charles O. Akanbi, Jacqueline C. Kramer, Carolyn D. Larson, Wei-Chen Ni +1 more | 1988-12-13 |