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| Patents for D. P. Wolhaupter | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 492,380 | Feb. 28, 1893 | C.S. Ahner | Sucker Rod Clamp Or Wrench | |
 | 518,136 | Apr. 10, 1894 | E.O. Rogers, S. Coons | Lathe Chuck | |
 | 530,109 | Dec. 04, 1894 | S.J. Johnston | Carriage or Wagon Jack | |
 | 549,221 | Nov. 05, 1895 | M. Wenger | Wrench | |
 | 560,438 | May 19, 1896 | E.H. Smith | Combined Nut and Pipe Wrench | |
 | 608,293 | Aug. 02, 1898 | O. Lannon | Pipe Wrench | |
 | 674,735 | May 21, 1901 | S.J. Johnston | Combination tool (brace wrench) | |