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Minneapolis, MN, United States of America

Onan Corporation

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USPTO Granted Patents = 68

EPO Patents = 1

Trademarks = 3

Forward Citations = 1,779

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82 inventors (with patents filed for the assignee):

David J Koenig (9 out of 34 patents)

Mark H Schultz (7 out of 10 patents)

Mark S Lent (6 out of 40 patents)

4. Rickie A Evenson (4 out of 6 patents)

5. Stephen M Clancey (4 out of 5 patents)

6. Anthony T Klejeski (4 out of 8 patents)

7. Loren L Rademacher (4 out of 4 patents)

8. Paul F Huffman (4 out of 4 patents)

9. David A Overland (4 out of 4 patents)

10. Jerome J Lemmer (4 out of 4 patents)

11. Curtis D Leaf (4 out of 4 patents)

12. Robert P Koziara (4 out of 4 patents)

13. Dale F Seeley (3 out of 48 patents)

14. Paul H Plahn (3 out of 9 patents)

15. John E Morley (3 out of 3 patents)

Core Competencies:

Mobile Energy Management

Load Power Fault Protection

Auxiliary Power Unit

Transfer Switch

Generator Control

Vibration Isolation

Electrical Generator

Carburetor System

Thermal Reactor

AC to AC Converter

Engine Efficiency

Power Supply Assembly

68 patents: Sort by Forward Citations

1. 6965818 - Mobile energy management system (2005-11-15),

2. 6919518 - Phase flux barriers for transfer switch (2005-07-19),

3. 6798627 - Engine generator set systems and methods providing load power fault protection (2004-09-28),

4. 6765157 - Transfer switch with improved actuator (2004-07-20),

5. 6737762 - Generator with DC boost for uninterruptible power supply system or for enhanced load pickup (2004-05-18),

6. 6700087 - Arc chute assembly (2004-03-02),

7. 6639331 - Parallel generator power system (2003-10-28),

8. 6534737 - Contact closing speed limiter for a transfer switch (2003-03-18),

9. 6355986 - Generator set control apparatus and method to avoid vehicle resonances (2002-03-12),

10. 5815058 - Contact enhancement apparatus for an electric switch (1998-09-29),

11. 5784267 - Quasi-sine wave and stepped square wave AC to AC converter (1998-07-21),

12. 5771682 - Thermal reactor (1998-06-30),

13. 5717273 - Insulating armature end turn cap (1998-02-10),

14. 5701070 - Electrical generator damage protection apparatus and method with circuit (1997-12-23),

15. 5652416 - Mechanically held electrically or manually operated switch (1997-07-29),

Company Overview

Onan Corporation, headquartered in Minneapolis, MN, specializes in the development and manufacturing of advanced generator systems. The company focuses on key technology areas including mobile energy management, load power fault protection, and auxiliary power units. Onan's expertise extends to generator control systems, transfer switches, and vibration isolation, ensuring reliable power solutions for various applications. With a commitment to innovation, Onan plays a significant role in enhancing energy efficiency and performance in generator technology.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

68 Patents

#32 in Minneapolis, MN

#151 in Minnesota

#5,378 in US

#10,898 in the World

Minneapolis, MN, United States of America

Onan Corporation

Forward Citations = 1,779

82 inventors:

David J Koenig (9 out of 34 patents)

Mark H Schultz (7 out of 10 patents)

Mark S Lent (6 out of 40 patents)

4. Rickie A Evenson (4 out of 6 patents)

5. Stephen M Clancey (4 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Onan Corporation. Retrieved from https://idiyas.com/company/onan

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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