James H. Johnson

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Woodstock, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Remote sensor device for monitoring motor vehicle exhaust systems
- Patent number 5,371,367
- Issue date Dec 6, 1994
- Envirotest Systems Corp.
- John DiDomenico
- G01 - MEASURING TESTING
Information Patent Grant
Remote sensor device for monitoring motor vehicle exhaust systems w...
- Patent number 5,343,043
- Issue date Aug 30, 1994
- Envirotest Syst. Corp.
- James H. Johnson
- G01 - MEASURING TESTING