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Ralph Kennedy
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Columbus, OH, US
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last 30 patents
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Patent Grant
Self-regulating concrete cutting saw
Patent number
4,748,966
Issue date
Jun 7, 1988
Ralph Kennedy
B28 - WORKING CEMENT, CLAY, OR STONE
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Patent Grant
Device for cutting a receptacle in pavement to receive plowable ref...
Patent number
4,463,989
Issue date
Aug 7, 1984
Ralph Kennedy
B28 - WORKING CEMENT, CLAY, OR STONE