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Patents for Howard Campbell
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
229,715Jul. 06, 1880H. Campbell, H.N. LandSteering Gear for Traction Enginestraction engine steering apparatus
254,223Feb. 28, 1882H. Campbell, H.N. LandTraction Enginesteam traction engines
257,444May 02, 1882H. Campbell, H.N. LandTraction Enginesteam traction engines
317,722May 12, 1885H.N. Land, H. CampbellPlatform for Traction Enginestraction engine suspensions
567,117Sep. 01, 1896W. Hearchel, H. CampbellThreshing Machinethreshers and thrashers
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