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| All Patents in class 433/113 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 118,268 | Aug. 22, 1871 | C. Poor | Improvement in Dental Drills | ||
| 145,098 | Dec. 02, 1873 | C.E. Edwards | Dental Drilling Machines | ||
| 229,614 | Jul. 06, 1880 | W.A. Johnson | Treadle Mechanism for Dental Engine | ||
| 236,080 | Dec. 28, 1880 | B.J. Quattlebaum | Portable Dental Engine | ||
| 301,722 | Jul. 08, 1884 | W.A. Johnson | Dental Engine | ||
| 363,291 | May 17, 1887 | W.W. Grant | Dental Engine | ||