Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12221952 | Hydraulic continuous variable speed system having hydraulic and pneumatic speed controls and a method of use | Douglas S. HIRSH | 2025-02-11 |
| 11837863 | Apparatus and method for monitoring a circuit under load using a circuit breaker | Douglas S. HIRSH | 2023-12-05 |
| 11795916 | Hydraulic continuous variable speed system having hydraulic and pneumatic speed controls and a method of use | Douglas S. HIRSH | 2023-10-24 |
| 10848139 | Method and apparatus for predicting failures in direct current circuits | Douglas S. HIRSH, Michael M. Muehlemann | 2020-11-24 |
| 10240774 | Method and apparatus for heating and purifying liquids | Douglas S. HIRSH | 2019-03-26 |