Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10075064 | High-frequency, high density power factor correction conversion for universal input grid interface | David J. Perreault, Khurram K. Afridi, Juan A. Santiago-Gonzalez | 2018-09-11 |
| 9660520 | Method and apparatus to provide power conversion with high power factor | David J. Perreault, Seungbum Lim | 2017-05-23 |
| 6431573 | Automatic transmission for a cycle, such as a bicycle, and a cycle having such as transmission | Victor S. Lerman, Harry H. Lerman | 2002-08-13 |
| 6056684 | Locking centrifuge rotor cover assembly | Benjamin Linder, Don Lee, Amy Battles | 2000-05-02 |
| 5774542 | Snap-in cover for a payphone number plate | Leo Francis Casey, Thomas Hamilton Warner | 1998-06-30 |
| 4987372 | Potentiometer state sensing circuit | John Ofori-Tenkorang, Leo Francis Casey | 1991-01-22 |
| 4599492 | Coin-telephone auditor | — | 1986-07-08 |
| 4593361 | Vending machine control circuit | — | 1986-06-03 |
| 4481590 | Vending machine control circuit | — | 1984-11-06 |
| 4372464 | Vending machine control circuit | — | 1983-02-08 |
| 4371832 | DC Ground fault detector wherein fault is sensed by noting imbalance of magnetic flux in a magnetic core | Gerald L. Wilson | 1983-02-01 |
| 4326191 | Automatic switching matrix | Martin F. Schlecht, John G. Kassakian, Anthony J. Caloggero, Bruce Rhodes, Neil Rasmussen | 1982-04-20 |
| 4229694 | Power angle relay to measure and respond to the power angle of a synchronous generator | Gerald L. Wilson | 1980-10-21 |
| 4201907 | Totalizer system | — | 1980-05-06 |