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| Patents for William P. Hopkins | |||||
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| Picture | Number | Date | Patentee | Title | |
| 86,399 | Feb. 02, 1869 | W.P. Hopkins | Step for Spindles | ||
 | 110,657 | Jan. 03, 1871 | W.P. Hopkins | Improvement in Calipers | |
| 132,400 | Oct. 22, 1872 | W.P. Hopkins | Improvement in Work Holders for Lathes | ||
| 134,381 | Dec. 31, 1872 | W.P. Hopkins | Work Holders for Lathes | ||
| 143,242 | Sep. 30, 1873 | W.P. Hopkins | Gear Cutting Attachments to Lathes | ||
| 156,705 | Nov. 10, 1874 | W.P. Hopkins | Gear Cutting Attachments for Lathes | ||