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For the Inventor, By the Inventor

Belleville, IL, United States of America

Empire Comfort Systems, Inc.


USPTO Granted Patents = 13

% Expired Patents = 30.8


Trademarks = 11

Forward Citations = 287

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14 inventors (with patents filed for the assignee):

goldMedal David M Christensen (6 out of 7 patents)

silverMedal Donald P Rigney (5 out of 5 patents)

bronzeMedal 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:

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),
Company Overview
Empire Comfort Systems, Inc. is a prominent manufacturer specializing in heating and cooling solutions, particularly known for its innovative gas-fired appliances. Based in Belleville, Illinois, the company focuses on delivering high-quality products that enhance indoor comfort and energy efficiency. With a commitment to research and development, Empire Comfort Systems continuously explores advancements in HVAC technology, ensuring its offerings meet evolving consumer needs and industry standards.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

13 Patents

#2 in Belleville, IL

#1,183 in Illinois

#23,838 in US

#45,039 in the World

Belleville, IL (US)
Belleville, IL, United States of America

Empire Comfort Systems, Inc.

Forward Citations = 287

14 inventors:

goldMedal David M Christensen (6 out of 7 patents)

silverMedal Donald P Rigney (5 out of 5 patents)

bronzeMedal 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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Empire Comfort Systems, Inc.. Retrieved from https://idiyas.com/company/empire-comfort-systems

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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