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For the Inventor, By the Inventor

Kentwood, MI, United States of America

Envirotronics, Inc.


USPTO Granted Patents = 3

Trademarks = 3

Forward Citations = 98

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6 inventors (with patents filed for the assignee):

goldMedal Dwayne D Botruff (2 out of 2 patents)

silverMedal Gregory J Langfeldt (2 out of 2 patents)

bronzeMedal John Grant Richardson (1 out of 36 patents)

4.  Gregory M Gilles (1 out of 1 patent)

5.  Charles F Felkins (1 out of 2 patents)

6.  Robert W Soldat (1 out of 1 patent)


3 patents:

1. 6272767 - Environmental test chamber (2001-08-14),
2. 6220100 - Vibration table with uniform distribution (2001-04-24),
3. 4298163 - Electronic multi-zone timed temperature control apparatus (1981-11-03),
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USPTO Data Jan 1 1976 - Sep 22 2026

3 Patents

#13 in Kentwood, MI

#2,489 in Michigan

#73,716 in US

Kentwood, MI (US)
Kentwood, MI, United States of America

Envirotronics, Inc.

Forward Citations = 98

6 inventors:

goldMedal Dwayne D Botruff (2 out of 2 patents)

silverMedal Gregory J Langfeldt (2 out of 2 patents)

bronzeMedal John Grant Richardson (1 out of 36 patents)

4.  Gregory M Gilles (1 out of 1 patent)

5.  Charles F Felkins (1 out of 2 patents)

Please report any incorrect information to [email protected]
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