Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7712319 | Refrigerant charge adequacy gauge | Robert J. Braun, Pengju Kang, Julio Concha, Sivakumar Gopalnarayanan, Dong Luo +1 more | 2010-05-11 |
| 7610765 | Refrigerant charge status indication method and device | Pengju Kang, Alan Matthew Finn, Sivakumar Gopalnarayanan, Dong Luo | 2009-11-03 |
| 7552596 | Dual thermochromic liquid crystal temperature sensing for refrigerant charge indication | Sivakumar Gopalnarayanan, Don A. Schuster, Craig Kersten, Larry D. Burns | 2009-06-30 |
| 7472557 | Automatic refrigerant charging apparatus | Pengju Kang, Sivakumar Gopalnarayanan, Dong Luo | 2009-01-06 |