Robert D. Stephens

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Sterling Heights, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Device and method for measuring temperture of vehicle exhaust
- Patent number 5,797,682
- Issue date Aug 25, 1998
- Envirotest Systems Corp.
- John Kert
- G01 - MEASURING TESTING
Information Patent Grant
Optical sensing apparatus for remotely measuring exhaust gas compos...
- Patent number 5,591,975
- Issue date Jan 7, 1997
- Santa Barbara Research Center
- Michael D. Jack
- G01 - MEASURING TESTING