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| Patents for John M. Gaar | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 27,497 | Mar. 13, 1860 | A. Gaar | Grain-cleaner | |
 | 103,245 | May 17, 1870 | A. Shearon | Improvement in head-blocks for saw-mills | |
| 325,526 | Sep. 01, 1885 | J.M. Gaar | Straw Stacker | ||