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