For the Inventor, By the Inventor

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Grand Rapids, MI, United States of America

Hart & Cooley, Inc.

USPTO Granted Patents = 14

% Expired Patents = 7.1

Trademarks = 15

Forward Citations = 85

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18 inventors (with patents filed for the assignee):

Roger P Engelke (4 out of 4 patents)

Johan K Rademaker (4 out of 4 patents)

Clark E Pridemore (2 out of 4 patents)

4. Glen A Edgar (1 out of 3 patents)

5. Keith E Page (1 out of 1 patent)

6. Eric Kipker (1 out of 1 patent)

7. Michael Lutz (1 out of 1 patent)

8. Alexander M Prociv (1 out of 1 patent)

9. Tiburcio Hernandez, Jr (1 out of 1 patent)

10. Justin Johnston (1 out of 1 patent)

11. David Wormmeester (1 out of 1 patent)

12. Leon Lietch (1 out of 1 patent)

13. Steve Brandsen (1 out of 1 patent)

14. Russell L Ver Brugge (1 out of 1 patent)

15. Jeff L Lampen (1 out of 1 patent)

14 patents: Sort by Forward Citations

1. 9441852 - Prefabricated, modular, fire resistance and non-fire resistance rated ventilation duct assembly with integral subducts (2016-09-13),

2. 8317235 - Flange cleat and method (2012-11-27),

3. 6270401 - Air diffuser with unitary valve assembly (2001-08-07),

4. 6135137 - Indexed coupler for positioning a shaft in multiple angular positions (2000-10-24),

5. 6087639 - Heating coil retainer bracket and method for manufacturing the same (2000-07-11),

6. 6079187 - Apparatus for packaging flexible duct for shipment and method for (2000-06-27),

7. D403752 - Vent cap (1999-01-05),

8. 5578232 - Open-coil heater assembly and insulator therefor (1996-11-26),

9. D367844 - Heater insulator (1996-03-12),

10. 5346130 - Thermally responsive air diffuser (1994-09-13),

11. D331102 - Combined ceiling diffuser and air deflector pendulum for providing (1992-11-17),

12. 5015015 - Clip securing arrangement for ventilation systems (1991-05-14),

13. 4876951 - Air register handle arrangement (1989-10-31),

14. 4815934 - Air deflector arrangement (1989-03-28),

Hart & Cooley, Inc. is a leading manufacturer of HVAC products for residential and commercial applications. With a history dating back over a century, the company offers a wide range of air distribution and ventilation products, including grilles, registers, diffusers, and flexible duct systems. Known for their commitment to quality and innovation, Hart & Cooley continues to be a trusted name in the industry.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

14 Patents

#46 in Grand Rapids, MI

#788 in Michigan

#22,289 in US

#42,168 in the World

Grand Rapids, MI, United States of America

Hart & Cooley, Inc.

Forward Citations = 85

18 inventors:

Roger P Engelke (4 out of 4 patents)

Johan K Rademaker (4 out of 4 patents)

Clark E Pridemore (2 out of 4 patents)

4. Glen A Edgar (1 out of 3 patents)

5. Keith E Page (1 out of 1 patent)

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