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For the Inventor, By the Inventor

Springfield, MO, United States of America

Butler Engineering LLC


USPTO Granted Patents = 2

Forward Citations = 10

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1 inventor (with patents filed for the assignee):

goldMedal Joel A Butler (2 out of 24 patents)


2 patents:

1. 9178352 - Performance and isolation improvements for digitally controlled AC attenuation and protection circuits (2015-11-03),
2. 8873211 - Performance and isolation improvements for digitally controlled AC attenuation and protection circuits (2014-10-28),
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USPTO Data Jan 1 1976 - Sep 29 2026

2 Patents

#32 in Springfield, MO

#1,318 in Missouri

#94,730 in US

Springfield, MO (US)
Springfield, MO, United States of America

Butler Engineering LLC

Forward Citations = 10

1 inventor:

goldMedal Joel A Butler (2 out of 24 patents)

Please report any incorrect information to [email protected]
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