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| Patents for William Schollhorn | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 51,967 | Jan. 09, 1866 | W. Schollhorn, F.P. Pfleghar | Improvement in Compasses and Calipers | |
 | 140,081 | Jun. 17, 1873 | W. Schollhorn | Improvement in pencil attachments | |
 | 350,702 | Oct. 12, 1886 | W. Schollhorn | Corkscrew | |