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Patents for W. A. Bertram
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
191,111May 22, 1877E. CatherImprovement in machines for compressing the ends of blind-slatswindowblind machines
218,002Jul. 29, 1879H. DucshMetal-Drilling Machinedrill presses
231,525Aug. 24, 1880W.H. Bateman, F.X. HooperPrinter's galleyprinter
252,313Jan. 17, 1882G. GrillGuard for variety molding-machineswoodworking machine safety guards
261,090Jul. 11, 1882G. GrillCircular-saw guardwoodworking machine safety guards
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