Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8630814 | Ultrasonic water level gauge and control device | Andrew A. Cheng, James J. GU | 2014-01-14 |
| 7275429 | Mechanical self-cleaning probe via bi-metallic or shape memory | Christopher Thomson | 2007-10-02 |
| 7161492 | Mechanical self-cleaning probe via a jiggler | Christopher Thomson | 2007-01-09 |