Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6264064 | Chemical delivery system with ultrasonic fluid sensors | Charles Michael Birtcher, Thomas Andrew Steidl, Martin Castaneda Martinez | 2001-07-24 |
| 4942921 | Forced air ventilation system | David Lee Haessig, Roger Hort | 1990-07-24 |