Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5638263 | Low and medium voltage PWM AC/DC power conversion method and apparatus | Harry Abrams, Peter Willard Hammond | 1997-06-10 |
| 5204595 | Method and apparatus for controlling a walking beam pump | William J. Happel | 1993-04-20 |
| 4293905 | Method and apparatus for controlling power and optimizing power factor in an AC-to-DC converter | — | 1981-10-06 |
| 4224663 | Mounting assembly for semiconductive controlled rectifiers | John J. Maiese | 1980-09-23 |