Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6198271 | Electronic wall-stud sensor display | Charles E. Heger | 2001-03-06 |
| 5956260 | Electronic level displaying inclination having digital and analog displays | Charles E. Heger | 1999-09-21 |
| 5917314 | Electronic wall-stud sensor with three capacitive elements | Charles E. Heger | 1999-06-29 |
| 5905455 | Dual transmitter visual display system | Charles E. Heger, James C. Long, Noel H. C. Marshall | 1999-05-18 |
| 5729143 | Metal detector with nulling of imbalance | Russell E. Tavernetti | 1998-03-17 |
| 5043666 | Self-calibrating electromagnetic field sensor for locating buried conduits | Russell E. Tavernetti | 1991-08-27 |