Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5329573 | Arrangement for obtaining authentication key parameters in a cellular mobile telecommunications switching network | Cheng-Tze Chang, Yie-de Zhu | 1994-07-12 |
| 5309501 | Arrangement for detecting fraudulently identified mobile stations in a cellular mobile telecommunications network | Jack Kozik, Dennis J. Wiest | 1994-05-03 |