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Patents for Williams Robert J. W
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
3,176,449Apr. 06, 1965C.S. Schultz, W.R. WReverse-jet type dust filter
CA-762,268Jul. 04, 1967W.R. W, C.S. SchultzReverse-jet type dust filter
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