Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9605680 | Control algorithm of variable speed pumping system | Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Ronald B. Robol, Everett Cox, Donald Steen +10 more | 2017-03-28 |
| 9448272 | Earthed connection detection | — | 2016-09-20 |
| 9404500 | Control algorithm of variable speed pumping system | Robert W. Stiles, Jr., Ronald B. Robol, Lars Hoffmann Berthelsen, Everett Cox, Donald Steen +4 more | 2016-08-02 |
| 8019479 | Control algorithm of variable speed pumping system | Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Ronald B. Robol, Christopher R. Yahnker, Everett Cox +10 more | 2011-09-13 |
| 7339287 | Power converter | Aksel Baagoe Jepsen, Uffe Borup | 2008-03-04 |
| 7221121 | Frequency converter for different mains voltages | Kenneth Skaug, Michael Toennes, Egon Krogh, Andreas Aupke | 2007-05-22 |
| 6483278 | Method and power supply device for generating regulated D.C. voltage from A.C. voltage | — | 2002-11-19 |
| 6134901 | Method of speed control of compressor and control arrangement using the method | Jan Carøe AARESTRUP | 2000-10-24 |
| 5093771 | Inverter circuit and a method for controlling same | — | 1992-03-03 |
| 4811189 | AC rectifier circuit with means for limiting the rectified voltage | Jorgen Rasmussen | 1989-03-07 |
| 4535280 | Stabilizing circuit for an inverse rectifier motor control | Anna Melamed | 1985-08-13 |
| 4196376 | Rotary speed ratio control arrangement | Niels Hasberg, Kaj Nielsen | 1980-04-01 |