Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5226148 | Method and apparatus for validating character strings | — | 1993-07-06 |
| 5027345 | Digital key telephone system | David Joseph Robertson, Ronald J. Maginley, Alan Stanley John Chapman, Terence Neil Thomas, Nadir Nizamuddin | 1991-06-25 |