John S. Schaefer

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Austin, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for detecting a completed electrical circuit, reverse pol...
- Patent number 6,462,555
- Issue date Oct 8, 2002
- John S. Schaefer
- G01 - MEASURING TESTING
Information Patent Grant
Apparatus for detecting a completed electrical circuit and testing...
- Patent number 6,246,225
- Issue date Jun 12, 2001
- John S. Schaefer
- G01 - MEASURING TESTING