For the Inventor, By the Inventor

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Belleville, IL, United States of America

Empire Comfort Systems, Inc.

USPTO Granted Patents = 13

CIPO Patents = 4

Trademarks = 14

Forward Citations = 278

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14 inventors (with patents filed for the assignee):

David M Christensen (6 out of 7 patents)

Donald P Rigney (5 out of 5 patents)

Lloyd R Maschhoff (4 out of 5 patents)

4. Bruce Dresner (3 out of 3 patents)

5. Scott G Schulte (2 out of 2 patents)

6. Frank D Wurth (1 out of 1 patent)

7. Bernard A Lauzon (1 out of 1 patent)

8. Daniel J Sovar (1 out of 1 patent)

9. John A Schweiss (1 out of 1 patent)

10. Wayne E Thuenemann (1 out of 1 patent)

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

12. Thomas D Vaughn (1 out of 6 patents)

13. Nick Bauer (1 out of 1 patent)

14. James Mcdonald (1 out of 1 patent)

15. Frank Wurth (0 patent)

13 patents: Sort by Forward Citations

1. 12480659 - Vent-free fireplace heat removal system and accessories adapted for removal of excess heat from a room wherein the vent-free fireplace is located (2025-11-25),

2. 11156383 - High efficiency heater with condensate collection and humidification (2021-10-26),

3. 10072872 - High efficiency heater with condensate collection and humidification (2018-09-11),

4. 9062881 - Control system for space heater/hearth (2015-06-23),

5. 6945160 - Outdoor cooker and smoker apparatus (2005-09-20),

6. 6481343 - Barbecue grill grate (2002-11-19),

7. 6446545 - Food cooking apparatus with drain spigot (2002-09-10),

8. 6314868 - Direct and indirect outdoor cooker (2001-11-13),

9. 6269737 - Food cooking apparatus (2001-08-07),

10. 6083392 - Ribbed funnel (2000-07-04),

11. 6073623 - Grill light (2000-06-13),

12. 5974954 - Barbecue grill grate (1999-11-02),

13. 5664555 - Wall heater with improved heat exchanger (1997-09-09),

Empire Comfort Systems, Inc. is a leading manufacturer of gas-fired heating products for residential and commercial spaces. With over 80 years of experience, Empire offers a wide range of products including gas fireplaces, heaters, stoves, and grills, known for their quality and innovation.

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

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USPTO Data Jan 1 1976 - Dec 16 2025

13 Patents

#2 in Belleville, IL

#1,147 in Illinois

#23,110 in US

#43,635 in the World

Belleville, IL, United States of America

Empire Comfort Systems, Inc.

Forward Citations = 278

14 inventors:

David M Christensen (6 out of 7 patents)

Donald P Rigney (5 out of 5 patents)

Lloyd R Maschhoff (4 out of 5 patents)

4. Bruce Dresner (3 out of 3 patents)

5. Scott G Schulte (2 out of 2 patents)

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