Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859991 | Electronic article surveillance system employing time domain and/or frequency domain analysis and computerized operation | Harry E. Watkins, Brent F. Balch, Jeffery T. Oakes, Richard L. Copeland, Mart Martinson | 1989-08-22 |