For the Inventor, By the Inventor

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Windsor, WI, United States of America

Clack Corporation

USPTO Granted Patents = 32

CIPO Patents = 3

Trademarks = 16

Forward Citations = 781

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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)

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),

Clack Corporation is a leading global provider of water treatment solutions. With over 80 years of experience, we specialize in manufacturing high-quality control valves, filters, and other water treatment components. Our innovative products are designed to improve water quality, enhance operational efficiency, and minimize environmental impact. Our goal is to deliver reliable and sustainable water treatment solutions that meet the diverse needs of our customers worldwide.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

32 Patents

#1 in Windsor, WI

#257 in Wisconsin

#10,234 in US

#20,074 in the World

Windsor, WI, United States of America

Clack Corporation

Forward Citations = 781

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)

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