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For the Inventor, By the Inventor

El Cerrito, CA, United States of America

Federspiel, Corporation


USPTO Granted Patents = 3

Trademarks = 1

Forward Citations = 73

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2 inventors (with patents filed for the assignee):

goldMedal Clifford Conrad Federspiel (3 out of 20 patents)

silverMedal Kurt Federspiel (1 out of 4 patents)


3 patents:

1. 8224489 - Method and apparatus for coordinating the control of HVAC units (2012-07-17),
2. 8190273 - Method and apparatus for controlling fans in heating, ventilating, and air-conditioning systems (2012-05-29),
3. 7726582 - Method and apparatus for converting constant-volume supply fans to variable flow operation (2010-06-01),
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USPTO Data Jan 1 1976 - Oct 6 2026

3 Patents

#3 in El Cerrito, CA

#16,847 in California

#73,815 in US

El Cerrito, CA (US)
El Cerrito, CA, United States of America

Federspiel, Corporation

Forward Citations = 73

2 inventors:

goldMedal Clifford Conrad Federspiel (3 out of 20 patents)

silverMedal Kurt Federspiel (1 out of 4 patents)

Please report any incorrect information to [email protected]
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