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Patents for F. F. Campbell
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
302,067Jul. 15, 1884A.D. WallenScrew holding screwdriverscrewdriver blades
309,620Dec. 23, 1884J. HausmanHammer Dieshammers
351,393Oct. 26, 1886P. Murray, Jr.Gas Enginegas and gasoline engines
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