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Graasten, Denmark

Danfoss Drives A/s

USPTO Granted Patents = 27

EPO Patents = 6

Trademarks = 4

Forward Citations = 958

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47 inventors (with patents filed for the assignee):

Lars Hoffmann Berthelsen (8 out of 45 patents)

Robert W Stiles, Jr (6 out of 48 patents)

Henrik Rosendal Andersen (5 out of 10 patents)

4. Gert Kjaer (3 out of 21 patents)

5. Ronald B Robol (3 out of 35 patents)

6. Peter Westermann-Rasmussen (3 out of 16 patents)

7. Florin Lungeanu (3 out of 21 patents)

8. Christopher Ryan Yahnker (3 out of 48 patents)

9. Micheal Pasche (2 out of 17 patents)

10. Einar Kjartan Runarsson (2 out of 17 patents)

11. Daniel J Hruby (2 out of 16 patents)

12. Kevin Murphy (2 out of 37 patents)

13. Alberto Morando (2 out of 5 patents)

14. Melissa Drechsel Kidd (2 out of 9 patents)

15. Li Fei Zheng (2 out of 27 patents)

27 patents: Sort by Forward Citations

1. 10240606 - Pumping system with two way communication (2019-03-26),

2. 9932984 - Pumping system with power optimization (2018-04-03),

3. 9777733 - Flow control (2017-10-03),

4. 9726184 - Safety vacuum release system (2017-08-08),

5. 9712098 - Safety system and method for pump and motor (2017-07-18),

6. 9692340 - Variable torque angle for electric motor (2017-06-27),

7. 9692337 - Method for controlling a synchronous reluctance electric motor (2017-06-27),

8. 9605680 - Control algorithm of variable speed pumping system (2017-03-28),

9. 9556874 - Method of controlling a pump and motor (2017-01-31),

10. 9551344 - Anti-entrapment and anti-dead head function (2017-01-24),

11. 8860344 - Method for implementing bootstrap-supply charging in a motor controller at energized motor and motor controller using such a method (2014-10-14),

12. 8648561 - Method for driving a pulse width modulated controller (2014-02-11),

13. 8552757 - Method for detecting a fault in an induction machine (2013-10-08),

14. 8379353 - Method for detecting earth-fault conditions in a motor controller (2013-02-19),

15. 8363408 - Electronic device and frequency converter of motor (2013-01-29),

Danfoss Drives A/S is the world leader in variable speed control of electric motors. We develop, manufacture, and supply a comprehensive range of highly reliable and innovative AC drives. Our drives optimize the performance of applications and help reduce energy consumption. With a strong focus on sustainability, we are committed to providing efficient drive solutions that enable our customers to achieve their environmental goals.

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Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

27 Patents

#1 in Graasten

#113 in Denmark

#23,291 in the World

Graasten, Denmark

Danfoss Drives A/s

Forward Citations = 958

47 inventors:

Lars Hoffmann Berthelsen (8 out of 45 patents)

Robert W Stiles, Jr (6 out of 48 patents)

Henrik Rosendal Andersen (5 out of 10 patents)

4. Gert Kjaer (3 out of 21 patents)

5. Ronald B Robol (3 out of 35 patents)

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