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| Patents for Elizabeth M. Bertsch | |||||
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| Number | Date | Patentee | Title | Type | |
| 981,426 | Jan. 10, 1911 | H.J. Hjorth | Tail Stock | ||
| 1,005,214 | Oct. 10, 1911 | H.J. Hjorth | Headstock or Chuck | ||
| 1,174,009 | Feb. 29, 1916 | H.J. Hjorth | Gage for Edged Tools | special purpose gauges | |