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| Patents for Mathew F. Biersdorf | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,142,138 | Jun. 08, 1915 | M.F. Biersdorf | Combined Lock and Butt Gage | butt gauges | |
| 1,282,670 | Oct. 22, 1918 | M.F. Biersdorf | Combined Lock and Butt Gage | butt gauges | |