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East Granby, CT, United States of America

Envirotest Systems Corporation

USPTO Granted Patents = 17

% Expired Patents = 5.9

Trademarks = 1

Forward Citations = 596

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30 inventors (with patents filed for the assignee):

John D Didomenico (5 out of 6 patents)

James Johnson (4 out of 69 patents)

Michael D Jack (4 out of 25 patents)

4. Thomas J Fournier (3 out of 9 patents)

5. Bruce R Kohn (3 out of 7 patents)

6. Craig S Rendahl (3 out of 16 patents)

7. David R Nelson (3 out of 7 patents)

8. Jay C Peterson (3 out of 3 patents)

9. Dennis L Smith (2 out of 3 patents)

10. Donald Hugh Stedman (2 out of 31 patents)

11. Troy P Bahan (2 out of 4 patents)

12. George Charles Polchin (1 out of 24 patents)

13. Kenneth W Michaels (1 out of 50 patents)

14. Pradeep R Tripathi (1 out of 5 patents)

15. W John Williams (1 out of 1 patent)

17 patents: Sort by Forward Citations

1. 7164132 - Multilane remote sensing device (2007-01-16),

2. 6723989 - Remote emissions sensing system and method with a composite beam of IR and UV radiation that is not split for detection (2004-04-20),

3. 6307201 - Method and apparatus for selecting a filter for a remote sensing device (2001-10-23),

4. 6230087 - Vehicular running loss detecting system (2001-05-08),

5. 5835871 - Method and system for diagnosing and reporting failure of a vehicle (1998-11-10),

6. 5831267 - Method and apparatus for remote measurement of exhaust gas (1998-11-03),

7. 5812249 - Speed and acceleration monitoring device using visible laser beams (1998-09-22),

8. 5797682 - Device and method for measuring temperture of vehicle exhaust (1998-08-25),

9. 5739413 - Forced dilution system and method for emissions measurement systems (1998-04-14),

10. 5726450 - Unmanned integrated optical remote emissions sensor (RES) for motor (1998-03-10),

11. 5719396 - Systems and methods for determining compliance of moving vehicles with (1998-02-17),

12. 5671158 - Apparatus and method for effecting wireless discourse between computer (1997-09-23),

13. 5644133 - Remote vehicle emission analyzer with light conveyance to detectors (1997-07-01),

14. 5465614 - Apparatus and method for non-intrusive testing of a motor vehicle (1995-11-14),

15. 5425266 - Apparatus and method for non-intrusive testing of motor vehicle (1995-06-20),

Envirotest Systems Corporation is a leading provider of vehicle emissions testing and environmental services. With over 30 years of experience, Envirotest helps to ensure cleaner air by monitoring emissions from vehicles and providing innovative solutions for environmental compliance. Their state-of-the-art technology and commitment to sustainability make them a trusted partner for governments, businesses, and communities around the world.

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

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USPTO Data Jan 1 1976 - Sep 15 2026

17 Patents

#3 in East Granby, CT

#443 in Connecticut

#18,850 in US

#35,824 in the World

East Granby, CT, United States of America

Envirotest Systems Corporation

Forward Citations = 596

30 inventors:

John D Didomenico (5 out of 6 patents)

James Johnson (4 out of 69 patents)

Michael D Jack (4 out of 25 patents)

4. Thomas J Fournier (3 out of 9 patents)

5. Bruce R Kohn (3 out of 7 patents)

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