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| Patents for William G. A. Bonwill | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 50,328 | Oct. 10, 1865 | W.G. Bonwill | Improvement in Screw-Drivers | |
| 148,920 | Mar. 24, 1874 | W.G. Bonwill | Dental Drills and Lathes | ||
| 199,779 | Jan. 29, 1878 | W.G. Bonwill | Dental Engine | ||
| 282,044 | Jul. 31, 1883 | W.G. Bonwill | Dental or Surgical Engine | ||