Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5640441 | Apparatus and method for incoming call detection and alarm circuitry for cellular telephones | Arthur L. Serrano | 1997-06-17 |
| 5638421 | Apparatus and method for incoming call detection and alarm circuitry for cellular telephones | Arthur L. Serrano | 1997-06-10 |