Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12366370 | Multi-zone variable refrigerant flow heating/cooling unit | Edward H. Metzger, Joel John Williams, Kelly Gene Sprayberry | 2025-07-22 |
| 11555618 | Multi-zone variable refrigerant flow heating/cooling unit | Edward H. Metzger, Joel John Williams, Kelly Gene Sprayberry | 2023-01-17 |
| 10890341 | Multi-zone variable refrigerant flow heating/cooling unit | Edward H. Metzger, Joel John Williams, Kelly Gene Sprayberry | 2021-01-12 |
| 10161640 | Multi-zone variable refrigerant flow heating/cooling unit | Kelly Gene Sprayberry, Joel John Williams, Edward H. Metzger | 2018-12-25 |
| 10088178 | Multi-zone variable refrigerant flow heating/cooling unit | Kelly Gene Sprayberry, Joel John Williams, Edward H. Metzger | 2018-10-02 |