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| Patents for D. P. Wohlhaupter | |||||
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| Number | Date | Patentee | Title | Type | |
| 572,186 | Dec. 01, 1896 | M. Wenger | Wrench | quick adjust wrenches | |
| D26,766 | Mar. 16, 1897 | R.D. Shafer | Design For A Wrench | wrenches | |
| 630,825 | Aug. 08, 1899 | D.M. Campbell | Winding Tool For Bale Fastenings | ratchet wrenches | |
| 636,649 | Nov. 07, 1899 | W.J. Fay | Wheel Wrench | axle nut wrenches that lock nut to wheel hub | |