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For the Inventor, By the Inventor

Wooster, OH, United States of America

Clearstack Combustion Corporation


USPTO Granted Patents = 2


Forward Citations = 29

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3 inventors (with patents filed for the assignee):

goldMedal Robert A Ashworth (2 out of 15 patents)

silverMedal Frederick J Murrell (1 out of 1 patent)

bronzeMedal Edward A Zawadzki (1 out of 1 patent)


2 patents:

1. 6325003 - Low nitrogen oxides emissions from carbonaceous fuel combustion using three stages of oxidation (2001-12-04),
2. 6085674 - Low nitrogen oxides emissions from carbonaceous fuel combustion using (2000-07-11),
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USPTO Data Jan 1 1976 - Sep 22 2026

2 Patents

#16 in Wooster, OH

#3,636 in Ohio

#94,647 in US

Wooster, OH (US)
Wooster, OH, United States of America

Clearstack Combustion Corporation

Forward Citations = 29

3 inventors:

goldMedal Robert A Ashworth (2 out of 15 patents)

silverMedal Frederick J Murrell (1 out of 1 patent)

bronzeMedal Edward A Zawadzki (1 out of 1 patent)

Please report any incorrect information to [email protected]
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