For the Inventor, By the Inventor

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Seattle, WA, United States of America

Clearsign Technologies Corporation

Calculating rank

USPTO Granted Patents = 26

% Expired Patents = 30.8

EPO Patents = 10

Forward Citations = 7

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20 inventors (with patents filed for the assignee):

Christopher A Wiklof (19 out of 212 patents)

Douglas Wayne Karkow (17 out of 48 patents)

Donald W Kendrick (13 out of 30 patents)

4. Joseph Colannino (10 out of 72 patents)

5. James Kyle Dansie (10 out of 15 patents)

6. Jesse Dumas (4 out of 9 patents)

7. Robert E Breidenthal (4 out of 34 patents)

8. Igor A Krichtafovitch (3 out of 70 patents)

9. Venkatesh Iyer (3 out of 3 patents)

10. Colin James Deller (3 out of 4 patents)

11. Jackson Matthew Pleis (3 out of 3 patents)

12. Sunny Karnani (2 out of 2 patents)

13. Robert Geiger (2 out of 3 patents)

14. Jonathan Bucher (1 out of 2 patents)

15. Jerry Michael Lang, Sr (1 out of 1 patent)

Core Competencies:

Flame Holder

Low NOx Burner

Combustion Assembly

Electrical Combustion Control

Gas Mixture Sensor

Transverse Flame Stabilizer

Ultra Low Emissions

Plasma Pilot

Pre-Mixed Fuel Burner

Combustion System

Perforated Reaction Holder

Electrodynamic Control

26 patents: Sort by Forward Citations

1. 12359804 - Burner system with discrete transverse flame stabilizers (2025-07-15),

2. 12247733 - Prefabricated integrated combustion assemblies and methods of installing the same into a combustion system (2025-03-11),

3. 12066248 - Burner system including a plurality of perforated flame holders (2024-08-20),

4. 12050151 - Burner including an electrical permittivity or electrical capacitance flame sensor (2024-07-30),

5. 12007301 - Variable composition gas mixture sensor (2024-06-11),

6. 11953201 - Control system and method for a burner with a distal flame holder (2024-04-09),

7. 11906160 - Combustion system including a mixing tube and a flame holder (2024-02-20),

8. 11473774 - Methods of upgrading a conventional combustion system to include a perforated flame holder (2022-10-18),

9. 11460188 - Ultra low emissions firetube boiler burner (2022-10-04),

10. 11435143 - Burner system with discrete transverse flame stabilizers (2022-09-06),

11. 11313553 - Plug and play burner (2022-04-26),

12. 11248786 - Method for a perforated flame holder with adjustable fuel nozzle (2022-02-15),

13. 11156356 - Fuel combustion system with a perforated reaction holder (2021-10-26),

14. 11073280 - Electrodynamic control in a burner system (2021-07-27),

15. 11060720 - Plasma pilot (2021-07-13),

Company Overview

Clearsign Technologies Corporation, based in Seattle, WA, specializes in advanced combustion technologies aimed at enhancing energy efficiency and reducing emissions in industrial applications. The company focuses on developing innovative solutions for the energy sector, particularly in optimizing combustion processes for various industries. By leveraging proprietary technology, Clearsign aims to address environmental challenges while improving operational performance for its clients, contributing to a more sustainable future.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Nov 10 2026

26 Patents

#88 in Seattle, WA

#290 in Washington

#12,888 in US

#24,889 in the World

Seattle, WA, United States of America

Clearsign Technologies Corporation

Forward Citations = 7

20 inventors:

Christopher A Wiklof (19 out of 212 patents)

Douglas Wayne Karkow (17 out of 48 patents)

Donald W Kendrick (13 out of 30 patents)

4. Joseph Colannino (10 out of 72 patents)

5. James Kyle Dansie (10 out of 15 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Clearsign Technologies Corporation. Retrieved from https://idiyas.com/company/clearsign-technologies

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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