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For the Inventor, By the Inventor

Ann Arbor, MI, United States of America

Thetford Corporation


USPTO Granted Patents = 123


Trademarks = 30

Forward Citations = 1,430

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92 inventors (with patents filed for the assignee):

goldMedal John M Antos (45 out of 45 patents)

silverMedal Charles L Sargent (25 out of 36 patents)

bronzeMedal George Grech (17 out of 17 patents)

4.  John Robert Selina (13 out of 35 patents)

5.  Frank T Sargent (13 out of 23 patents)

6.  David B Cameron (10 out of 13 patents)

7.  Arthur W Henke (10 out of 12 patents)

8.  Michael B Fritz (9 out of 10 patents)

9.  Jason Smith (8 out of 24 patents)

10.  Brian Kelly (8 out of 8 patents)

11.  John A Hoffman (8 out of 9 patents)

12.  Thomas Cornille (7 out of 7 patents)

13.  Mark D Good (7 out of 25 patents)

14.  James Kenneth Miller (7 out of 7 patents)

15.  Kenneth J Hall (6 out of 7 patents)


Core Competencies:
Cooking System
Waste Fluid Holding Tank
Absorption Refrigerator
Flush Toilet Control
Sanitation System
Portable Waste Transfer Tank
Vehicle Wastewater Drainage
Macerator Toilet
Refrigeration Storage Bin
Dual Diaphragm Pump
Wall Mounted Toilet
Reduced Water Consumption Flush Toilet

123 patents:

1. D1089612 - Extraction unit for a cooking system (2025-08-19),
2. D1045492 - Induction unit for a cooking system (2024-10-08),
3. 9908122 - Waste fluid holding tank drain system and method (2018-03-06),
4. 9644143 - Working material for an absorption cooling machine (2017-05-09),
5. 9250011 - Absorption refrigerator with temperature control (2016-02-02),
6. 9080323 - Sealing member for a flush toilet (2015-07-14),
7. 8997268 - Flush toilet control system and related method (2015-04-07),
8. 8984675 - Control system for a plurality of toilets and related method (2015-03-24),
9. 8826939 - Drain system (2014-09-09),
10. 8777434 - Refrigerator with externally mounted lighting (2014-07-15),
11. 8672177 - Portable waste transfer tank (2014-03-18),
12. 8656963 - Vehicle wastewater drainage system (2014-02-25),
13. 8529223 - Dual diaphragm pump assembly for a sanitation system (2013-09-10),
14. 8516622 - Sanitary system for a vehicle including a removable holding tank (2013-08-27),
15. 8276218 - Macerator toilet (2012-10-02),
THETFORD CORPORATION is a leading provider of mobile sanitation products for recreational vehicles, boats, and trucks. With a commitment to innovation and customer satisfaction, THETFORD offers a comprehensive range of high-quality portable toilets, sanitation chemicals, and cleaning solutions. Their website showcases their extensive product line and provides detailed information on their solutions for maintaining clean and hygienic mobile living spaces.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

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123 Patents

#5 in Ann Arbor, MI

#120 in Michigan

#3,029 in US

#6,318 in the World

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Ann Arbor, MI, United States of America

Thetford Corporation

Forward Citations = 1,430

92 inventors:

goldMedal John M Antos (45 out of 45 patents)

silverMedal Charles L Sargent (25 out of 36 patents)

bronzeMedal George Grech (17 out of 17 patents)

4.  John Robert Selina (13 out of 35 patents)

5.  Frank T Sargent (13 out of 23 patents)

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