For the Inventor, By the Inventor

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Farmington Hills, MI, United States of America

Welding Technology Corporation

USPTO Granted Patents = 3

Trademarks = 2

Forward Citations = 49

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2 inventors (with patents filed for the assignee):

John Foster Farrow (3 out of 13 patents)

Jeffrey J Mason (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 8212570 - Amplifier circuit for a current transformer (2012-07-03),

2. 8174399 - Methods to detect hazardous conditions in a safety ground circuit in the presence of ground loop currents and electrical noise (2012-05-08),

3. 7420133 - Door interlock for rotary actuated circuit breaker (2008-09-02),

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USPTO Data Jan 1 1976 - Dec 30 2025

3 Patents

#55 in Farmington Hills, MI

#2,448 in Michigan

#72,030 in US

Farmington Hills, MI, United States of America

Welding Technology Corporation

Forward Citations = 49

2 inventors:

John Foster Farrow (3 out of 13 patents)

Jeffrey J Mason (1 out of 1 patent)

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