Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7386110 | Directory assistance utilizing a personalized cache | Robert W. Petrunka | 2008-06-10 |
| 4213201 | Modular time division switching system | Real Gagnier, Ernst A. Munter, John B. Bourne, Ceasar Cesaratto, Conrad W. Lewis +2 more | 1980-07-15 |