Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6149066 | Method and apparatus for controlling supplemental heat in a heat pump system | Timothy J. Perry, Hongmei Liang, Larry J. Burkhart, Raymond A. Rust, Jr., Louis J. Sullivan | 2000-11-21 |
| 5967411 | Method and apparatus for controlling supplemental heat in a heat pump system | Timothy J. Perry, Hongmei Liang, Larry J. Burkhart, Raymond A. Rust, Jr., Louis J. Sullivan | 1999-10-19 |