Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6636042 | Under and above ground, radio frequency driven element, vector display, metal locating system | — | 2003-10-21 |
| 6636043 | Variable resolution vector positional display for use with an underground object locating system | — | 2003-10-21 |
| 6541976 | Under and above ground, radio frequency driven element, metal locating system | — | 2003-04-01 |
| 5038221 | Luminance encoded digital audio system | — | 1991-08-06 |
| 4190737 | Compatible four channel FM system | — | 1980-02-26 |