Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11162722 | Retrofitting R410A HVAC products to handle flammable refrigerants | Stephen A. Kujak | 2021-11-02 |
| 11092151 | System and method for controlling a system that includes fixed speed and variable speed compressors | John Zhou, Roger J. Voorhis, Caleb Ryan Joiner, Benjamin Hayes, James P. Crolius | 2021-08-17 |