Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7213464 | System for visually monitoring pressure in an enclosed space | — | 2007-05-08 |
| 6328647 | Pressure differential detecting system, and method of use | — | 2001-12-11 |
| 5131887 | Pressure controlled fresh air supply ventilation system using soil gas pressure as a reference, and method of use | — | 1992-07-21 |
| 5003865 | Pressure controlled fresh air supply ventilation system soil gas pressure as a reference, and method of use | — | 1991-04-02 |