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| Patents for Otto G. Mayer | |||||
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| Number | Date | Patentee | Title | Type | |
| 247,894 | Oct. 04, 1881 | J.M. Doyle | Bench-dog | bench stops | |
| 857,185 | Jun. 18, 1907 | O.G. Mayer | Compass-Handle-Adjusting Device | compasses | |