Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6559653 | Three wire interface for field wiring of on/off sensors | David C. Macke, Sr. | 2003-05-06 |
| 6539797 | Auto-compensating capacitive level sensor | Richard Livingston | 2003-04-01 |