Charles De Renzi

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Exton, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Vehicle presence detection system
- Patent number 6,292,112
- Issue date Sep 18, 2001
- 3461513 Canada Inc.
- Clifford Bader
- G08 - SIGNALLING
Information Patent Grant
Vehicle presence detection system
- Patent number 6,195,020
- Issue date Feb 27, 2001
- 3461513 Canada Inc.
- Ronald E. Brodeur
- G08 - SIGNALLING
Information Patent Grant
Vehicle presence detection system
- Patent number 5,868,360
- Issue date Feb 9, 1999
- PrimeTech Electronics Inc.
- Clifford Bader
- B61 - RAILWAYS