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| Patents for Walter Stumpf | |||||
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| Number | Date | Patentee | Title | Type | |
| D57,576 | Apr. 26, 1921 | S.D. Black, A.G. Decker | Design for a portable electric tool | handheld power drills | |
| 1,548,020 | Aug. 04, 1925 | S.D. Black, A.G. Decker | Reversing means for electric tools | handheld power tools | |
| 1,633,389 | Jun. 21, 1927 | W. Stumpf | Electric tool | handheld power tools | |
| 1,689,460 | Oct. 30, 1928 | W. Stumpf | Rivet spinning attachment | handheld power tool accessories | |
| 1,911,857 | May 30, 1933 | W. Stumpf | Grinder speed control | ||