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For the Inventor, By the Inventor

Seattle, WA, United States of America

Clearsign Combustion Corporation


USPTO Granted Patents = 83

% Expired Patents = 79.5


Trademarks = 3

Forward Citations = 898

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24 inventors (with patents filed for the assignee):

goldMedal Christopher A Wiklof (72 out of 211 patents)

silverMedal Joseph Colannino (60 out of 72 patents)

bronzeMedal Igor A Krichtafovitch (40 out of 70 patents)

4.  Douglas Wayne Karkow (29 out of 48 patents)

5.  David B Goodson (23 out of 31 patents)

6.  Robert E Breidenthal (19 out of 34 patents)

7.  Tracy A Prevo (13 out of 13 patents)

8.  Thomas S Hartwick (6 out of 6 patents)

9.  Roberto G Ruiz (5 out of 14 patents)

10.  Jesse Dumas (4 out of 9 patents)

11.  Richard F Rutkowski (4 out of 4 patents)

12.  James Kyle Dansie (4 out of 15 patents)

13.  Vincenzo Casasanta, Iii (2 out of 52 patents)

14.  Kraig K Anderson (2 out of 20 patents)

15.  Donald W Kendrick (2 out of 30 patents)


Core Competencies:
Electrodynamic Control
Low NOx Burner
Flame Holder
Combustion System
Fuel Combustion
Ionizer
Heat Transfer
Fluid Heater
Combustor
Electrode
Acoustic Control
Fuel Types

83 patents:

1. 11221137 - Field installed perforated flame holder and method of assembly and installation (2022-01-11),
2. 10619845 - Cooled ceramic electrode supports (2020-04-14),
3. 10571124 - Selectable dilution low NOx burner (2020-02-25),
4. 10539326 - Duplex burner with velocity-compensated mesh and thickness (2020-01-21),
5. 10514165 - Perforated flame holder and system including protection from abrasive or corrosive fuel (2019-12-24),
6. 10458649 - Horizontally fired burner with a perforated flame holder (2019-10-29),
7. 10458647 - Adaptor for providing electrical combustion control to a burner (2019-10-29),
8. 10422523 - Ionizer for a combustion system (2019-09-24),
9. 10386062 - Method for operating a combustion system including a perforated flame holder (2019-08-20),
10. 10364984 - Burner system including at least one coanda surface and electrodynamic control system, and related methods (2019-07-30),
11. 10364980 - Control of combustion reaction physical extent (2019-07-30),
12. 10359213 - Method for low NOx fire tube boiler (2019-07-23),
13. 10359189 - Electrodynamic combustion control with current limiting electrical element (2019-07-23),
14. 10337729 - Fuel combustion system with a perforated reaction holder (2019-07-02),
15. 10295185 - Flame visualization control for electrodynamic combustion control (2019-05-21),
Clearsign Combustion Corporation, based in Seattle, WA, specializes in advanced combustion technologies aimed at enhancing efficiency and reducing emissions in industrial applications. The company focuses on electrodynamic combustion systems, which utilize innovative techniques such as electrodynamic control and low NOx burners to optimize fuel combustion and heat transfer. Their solutions are designed to improve combustion performance while minimizing environmental impact, making them a key player in the transition towards cleaner energy solutions.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Clearsign Combustion Corporation
83 Patents

#27 in Seattle, WA

#80 in Washington

#4,466 in US

#9,133 in the World

Seattle, WA (US)
Seattle, WA, United States of America

Clearsign Combustion Corporation

Forward Citations = 898

24 inventors:

goldMedal Christopher A Wiklof (72 out of 211 patents)

silverMedal Joseph Colannino (60 out of 72 patents)

bronzeMedal Igor A Krichtafovitch (40 out of 70 patents)

4.  Douglas Wayne Karkow (29 out of 48 patents)

5.  David B Goodson (23 out of 31 patents)

Please report any incorrect information to [email protected]
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