Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11573148 | Leakage detection in condensing water heater | Jianmin Yin, Quinn Thomas Keller | 2023-02-07 |
| 10598530 | Flow sensor with hot film anemometer | Charles J. Koehler, III | 2020-03-24 |
| 10274353 | Flow sensor with hot film anemometer | Charles J. Koehler, III | 2019-04-30 |
| 10139129 | Water heater having thermal displacement conduit | Jianmin Yin | 2018-11-27 |
| 9391493 | Air cooled electric motor | Ngan Fai Leung, Stephen English, Janice Fitzgerald, Frank Edward Staigl, III, Joseph A. Henry +2 more | 2016-07-12 |
| 8519582 | Air cooled electric motor | Ngan Fai Leung, Stephen English, John R. Belko, Janice Fitzgerald, Frank Edward Staigl, III +2 more | 2013-08-27 |
| 8390161 | Electric motor having a rain guard | Frank Edward Staigl, III | 2013-03-05 |