Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12313075 | High efficiency hydronic circulator with sensors | Steve Thompson, David Sweet, Robert F. Birkenstock, JR., Douglas Bird | 2025-05-27 |
| D853118 | Plastic Storage container | Mark A. Gasbarro | 2019-07-09 |
| 9866093 | Brushless DC motor with permanent magnet rotor | Di Wu, Robert F. Birkenstock, JR. | 2018-01-09 |
| 9401631 | Brushless DC motor with permanent magnet rotor | Di Wu, Robert F. Birkenstock, JR. | 2016-07-26 |