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Strongsville, OH, United States of America

Clark-Reliance Corporation

Calculating rank

USPTO Granted Patents = 21

% Expired Patents = 4.8

Trademarks = 20

Forward Citations = 200

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22 inventors (with patents filed for the assignee):

David E Brown (7 out of 7 patents)

David E Purcel (5 out of 5 patents)

Michael E Winiasz (4 out of 23 patents)

4. Mark A Colman (4 out of 4 patents)

5. Steven Robert McGuigan (3 out of 3 patents)

6. Michael J Kett (3 out of 3 patents)

7. Syed Sultan (1 out of 1 patent)

8. Dennis M Barrett (1 out of 1 patent)

9. Thomas H Lee (1 out of 72 patents)

10. Thomas W Lisy (1 out of 1 patent)

11. John A Hobing (1 out of 1 patent)

12. Robert Martin Wilber, Jr (1 out of 1 patent)

13. Robert A Custer (1 out of 1 patent)

14. Christopher W Fadden (1 out of 1 patent)

15. Kenneth H Kowalski (1 out of 1 patent)

21 patents: Sort by Forward Citations

1. 11313713 - Magnetostrictive transmitter (2022-04-26),

2. 10258916 - Filtering system including impermeable extension for filtering element (2019-04-16),

3. 9920840 - Valve with different threads for preventing rotation of and locking bonnet within valve (2018-03-20),

4. 9329069 - Liquid level system with blowdown feature (2016-05-03),

5. 7047806 - Liquid level gage and illuminator therefor (2006-05-23),

6. 6666086 - Automatic boiler level controller (2003-12-23),

7. 6575010 - Method and system for detecting and cross-checking faulty sensors in liquid level indicators and controllers (2003-06-10),

8. 5743137 - Magnetic float assembly (1998-04-28),

9. 5647656 - Illuminated fluid level indicator (1997-07-15),

10. 5645336 - Illuminated fluid level indicator (1997-07-08),

11. 5351036 - Microwave-based point liquid level monitoring system (1994-09-27),

12. 5343826 - Fluid indicator assemblies for sight flow apparatus (1994-09-06),

13. 5297429 - Sanitary sight indicator (1994-03-29),

14. 5249464 - Sight flow apparatus with cartridge (1993-10-05),

15. 5243929 - Tubular sanitary sight indicator (1993-09-14),

Company Overview

Clark-Reliance Corporation, based in Strongsville, Ohio, specializes in the design and manufacture of innovative solutions for process control and measurement. The company focuses on providing high-quality products for industries such as oil and gas, power generation, and water treatment. With a commitment to engineering excellence, Clark-Reliance develops advanced technologies that enhance operational efficiency and safety in critical applications. Their expertise spans various domains, including instrumentation, filtration, and level measurement systems.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

21 Patents

#3 in Strongsville, OH

#681 in Ohio

#15,719 in US

#30,018 in the World

Strongsville, OH, United States of America

Clark-Reliance Corporation

Forward Citations = 200

22 inventors:

David E Brown (7 out of 7 patents)

David E Purcel (5 out of 5 patents)

Michael E Winiasz (4 out of 23 patents)

4. Mark A Colman (4 out of 4 patents)

5. Steven Robert McGuigan (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Clark-Reliance Corporation. Retrieved from https://idiyas.com/company/clark-reliance

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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