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David L. Perry
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Canton, MI, US
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last 30 patents
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Patent Grant
Portable hand-held voltage sensor with manually adjustable referenc...
Patent number
4,634,971
Issue date
Jan 6, 1987
Ford Motor Company
Robert C. Johnson
G01 - MEASURING TESTING
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Patent Grant
Ignition system tester
Patent number
4,449,100
Issue date
May 15, 1984
Ford Motor Company
Robert C. Johnson
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS