William H Groves, Jr.

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Arlington, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Sonic building rescue beacon
- Patent number 7,839,290
- Issue date Nov 23, 2010
- David Welford Chidakel
- G01 - MEASURING TESTING
Information Patent Grant
Vertical extender for an electrical outlet which protects pets and...
- Patent number 7,517,221
- Issue date Apr 14, 2009
- David W Chidakel
- H01 - BASIC ELECTRIC ELEMENTS