Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12259151 | HVAC motor automation control unit and adjustment methods and apparatus for same | Ronald Sai Kit Yip, Roger Hort | 2025-03-25 |
| 12181166 | Methods to monitor air filter life in fan motor controller and apparatus for same | Ronald Sai Kit Yip, Roger Hort | 2024-12-31 |
| 12099074 | Electronic proof of air flow switch | Joshua Lee Welton | 2024-09-24 |
| 12025329 | HVAC motor control local display and adjustment methods and apparatus for same | Ronald Sai Kit Yip, Roger Hort, Joshua Lee Welton | 2024-07-02 |
| 5344068 | Dynamically controlled environmental control system | — | 1994-09-06 |
| 5005636 | Variable air volume ventilating system and method of operating same | — | 1991-04-09 |
| 4942921 | Forced air ventilation system | Jamshid Jay Hamidi, Roger Hort | 1990-07-24 |