For the Inventor, By the Inventor

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Whiting, IN, United States of America

Polyjohn Enterprises Corporation

USPTO Granted Patents = 26

Trademarks = 5

Forward Citations = 310

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8 inventors (with patents filed for the assignee):

George W Harding (9 out of 11 patents)

Richard L Tagg (9 out of 13 patents)

Rodney M Mullett (8 out of 8 patents)

4. Jamie Phillip Kostelyk (8 out of 8 patents)

5. Vaughan D Smith, Ii (5 out of 5 patents)

6. Daniel G Tyler (4 out of 4 patents)

7. Jacob H Shubinski (2 out of 2 patents)

8. George Hiskes (2 out of 2 patents)

26 patents: Sort by Forward Citations

1. 8091157 - Modular portable restroom (2012-01-10),

2. 7837060 - Portable sanitary dispenser assembly (2010-11-23),

3. 7730561 - Used water removal system for a portable, hand-wash sink station (2010-06-08),

4. D609413 - Portable restroom (2010-02-02),

5. D607677 - Portable sanitary dispenser assembly (2010-01-12),

6. D553753 - Portable, stand-alone, double bowl, hand-wash sink station (2007-10-23),

7. 6427256 - Knockdown portable toilet (2002-08-06),

8. D401679 - Portable sink (1998-11-24),

9. D391343 - Portable sink (1998-02-24),

10. 5687434 - Portable stand-alone sink unit (1997-11-18),

11. 5682622 - Portable stand-alone restroom facility with handicap access (1997-11-04),

12. D384751 - Portable stand alone restroom facility having handicap access (1997-10-07),

13. 5560050 - Portable combined toilet and waste holding tank (1996-10-01),

14. 5500962 - Outdoor toilet cabana (1996-03-26),

15. 5500960 - Flush system for outdoor portable toilets (1996-03-26),

PolyJohn Enterprises Corporation is a leading manufacturer of portable sanitation products. They offer a wide range of products, including portable toilets, sinks, showers, and wastewater tanks, for various industries and applications. With over 45 years of experience in the industry, PolyJohn is known for their innovative solutions, high-quality products, and commitment to customer satisfaction.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

26 Patents

#1 in Whiting, IN

#192 in Indiana

#12,432 in US

#24,068 in the World

Whiting, IN, United States of America

Polyjohn Enterprises Corporation

Forward Citations = 310

8 inventors:

George W Harding (9 out of 11 patents)

Richard L Tagg (9 out of 13 patents)

Rodney M Mullett (8 out of 8 patents)

4. Jamie Phillip Kostelyk (8 out of 8 patents)

5. Vaughan D Smith, Ii (5 out of 5 patents)

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