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| Patents for Amos W. Sangster | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 142,357 | Sep. 02, 1873 | A. Smith | Improvement in apparatus for burning gas-tar | |
 | 142,809 | Sep. 16, 1873 | J.T. Noye | Improvement in tramming-bolts for grinding-mills | |
 | 166,758 | Aug. 17, 1875 | C.M. Farrar | Rotary Balanced Valve | |
 | 172,557 | Jan. 25, 1876 | F. Collignon | Steam Boiler | |
 | 245,608 | Aug. 16, 1881 | J.J. Burk | Feeding-attachment for planing-machines | |
 | 292,817 | Feb. 05, 1884 | E. Holmes, B. Holmes | Windlass for Compressing Barrels | |