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| Patents for Three Rivers Mfg. Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 141,852 | Aug. 19, 1873 | W.G. Caldwell | Improvement in machines for edging lumber | |
 | 146,632 | Jan. 20, 1874 | J. Allen | Improvement in lath-machines | |
 | 172,121 | Jan. 11, 1876 | L.S. Hogeboom | Improvement in gang-edgers | |