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| Patents for J. C. Larsen | |||||
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| Number | Date | Patentee | Title | Type | |
| 785,739 | Mar. 28, 1905 | A. Kettnich | Taper Gage | measurement gauges | |
| 799,474 | Sep. 12, 1905 | J.A. Larson, C.A. Brage | Carpenter's Tool | squares | |
| 830,888 | Sep. 11, 1906 | W.W. Cronk | Fruit Jar Opener | jar wrenches | |
| 995,178 | Jun. 13, 1911 | W. Potter | Boring-Machine alarm | drill depth stops | |
| 1,004,902 | Oct. 03, 1911 | W. Potter | Boring-Bit | auger bits | |