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Patents for Walter Stumpf
Patents 1 - 5 of 5
First set of recordsLast set of records
D57,576Apr. 26, 1921S.D. Black, A.G. DeckerDesign for a portable electric toolhandheld drills
1,548,020Aug. 04, 1925S.D. Black, A.G. DeckerReversing means for electric toolshandheld power tools
1,633,389Jun. 21, 1927W. StumpfElectric toolhandheld power tools
1,689,460Oct. 30, 1928W. StumpfRivet spinning attachmenthandheld power tool accessories
1,911,857May 30, 1933W. StumpfGrinder speed control
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