For the Inventor, By the Inventor

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Windsor, WI, United States of America

Clack Corporation

USPTO Granted Patents = 32

% Expired Patents = 12.5

CIPO Patents = 3

Trademarks = 15

Forward Citations = 795

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13 inventors (with patents filed for the assignee):

Robert A Clack (16 out of 18 patents)

Don D Vaughan (9 out of 15 patents)

Richard E Clack (7 out of 7 patents)

4. Melvin R Hemp (5 out of 5 patents)

5. Daniel A Klein (3 out of 8 patents)

6. Don Vaughan (3 out of 3 patents)

7. W Roger McPherson (2 out of 2 patents)

8. Michael Paquette (2 out of 2 patents)

9. Paul Michael Pedersen (1 out of 11 patents)

10. Paul D Nielsen (1 out of 1 patent)

11. Mark Gilbertson (1 out of 15 patents)

12. Jack E Wies (1 out of 3 patents)

13. Leigh A Fieldstad (1 out of 1 patent)

14. Don Douglas Vaughan (0 patent)

Core Competencies:

Fluid Treatment Tank

Water Purification

Conductivity Monitor

Filtration System

Modular Filter Assembly

Reverse Osmosis

Blow Molded Article

Flow Control Device

Brine Seal

Self-Contained Apparatus

Baffle Plate

Faucet

32 patents: Sort by Forward Citations

1. 12415233 - Fluid treatment tank having a laser welded distributor plate (2025-09-16),

2. 12297129 - Water treatment tank with conductivity monitor (2025-05-13),

3. 12090573 - Fluid treatment tank having a laser welded distributor plate (2024-09-17),

4. 11059727 - Fluid treatment tank having air blocker (2021-07-13),

5. 10472251 - Fluid treatment tank having a distributor plate (2019-11-12),

6. 10106434 - Fluid treatment tank having a distributor plate (2018-10-23),

7. 9079783 - Distributor arrangement for a fluid treatment tank (2015-07-14),

8. 9051196 - Baffle plate for a water treatment device (2015-06-09),

9. 8961797 - Water treatment system tank selector valve assembly (2015-02-24),

10. 7690914 - Apparatus for making a blow molded article with integral insert (2010-04-06),

11. 7476354 - Method and apparatus for making a blow molded article with integral insert (2009-01-13),

12. 7243669 - Float-responsive valve with premature closure prevention (2007-07-17),

13. 7017600 - Faucet (2006-03-28),

14. 6776901 - Quiet flow control washer for water softener or the like (2004-08-17),

15. 6402944 - Water softener control valve with removable seal stack (2002-06-11),

Company Overview

Clack Corporation, based in Windsor, Wisconsin, specializes in the development and manufacturing of water treatment solutions. The company focuses on producing high-quality filtration and softening systems, catering to both residential and commercial markets. With a commitment to innovation, Clack Corporation invests in advanced technologies to enhance water quality and efficiency. Their expertise spans various applications, including industrial processes and municipal water systems, positioning them as a key player in the water treatment industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

32 Patents

#1 in Windsor, WI

#257 in Wisconsin

#10,593 in US

#20,660 in the World

Windsor, WI, United States of America

Clack Corporation

Forward Citations = 795

13 inventors:

Robert A Clack (16 out of 18 patents)

Don D Vaughan (9 out of 15 patents)

Richard E Clack (7 out of 7 patents)

4. Melvin R Hemp (5 out of 5 patents)

5. Daniel A Klein (3 out of 8 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Clack Corporation. Retrieved from https://idiyas.com/company/clack

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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