Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5655380 | Step function inverter system | — | 1997-08-12 |
| 5649428 | Hybrid air-conditioning system with improved recovery evaporator and subcool condenser coils | Henry Y. Mark | 1997-07-22 |