Port Washington, WI, United States of America

Kleen Test Products Corporation


USPTO Granted Patents = 3

% Expired Patents = 66.7

Trademarks = 17

Forward Citations = 39

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9 inventors (with patents filed for the assignee):

goldMedal Jeffrey G Maxon (2 out of 2 patents)

silverMedal Douglas J Arnold (2 out of 2 patents)

bronzeMedal William T Ahlborn (1 out of 1 patent)

4.  Mark A Oman (1 out of 1 patent)

5.  Linnea L Esberg (1 out of 1 patent)

6.  Keith S Everson (1 out of 11 patents)

7.  Kelly R Effert (1 out of 1 patent)

8.  Greg W Gierach (1 out of 1 patent)

9.  Richard J Haertle (1 out of 1 patent)


3 patents:

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USPTO Data Jan 1 1976 - Oct 13 2026

3 Patents

#9 in Port Washington, WI

#1,484 in Wisconsin

#73,860 in US

Port Washington, WI (US)
Port Washington, WI, United States of America
Forward Citations = 39

9 inventors:

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kleen Test Products Corporation. Retrieved from https://idiyas.com/company/kleen-test-products

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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