Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5220593 | Cellular radiotelephone credit card paystation method | Robert G. Zicker, Thanh H. Cao, Daniel Borkowski, Phillip Brown | 1993-06-15 |
| 5144649 | Cellular radiotelephone credit card paystation method | Robert G. Zicker, Thanh H. Cao, Daniel Borkowski, Phillip Brown | 1992-09-01 |
| 4918630 | Computer timing system having backup trigger switches for timing competitive events | Robert H. Weller | 1990-04-17 |
| 4696026 | Multiplexed terminal for monitoring and controlling a plurality of remote telephone switches | — | 1987-09-22 |