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| Patents for Amos W. Sangster | |||||
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| Number | Title | Classification(s) | |||
| 142,357 | Improvement in apparatus for burning gas-tar | 431/239 | |||
| 142,809 | Improvement in tramming-bolts for grinding-mills | 241/286 | |||
| 166,758 | Rotary Balanced Valve | 137/625.22 | |||
| 172,557 | Steam Boiler | 122/155.3, 122/160, 122/DIG.1 | |||
| 245,608 | Feeding-attachment for planing-machines | 144/242.1, 144/245.5, 271/119 | |||
| 292,817 | Windlass for Compressing Barrels | 147/4 | |||