| Patents for Amos W. Sangster |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 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 | grist mills |
| 166,758 | Aug. 17, 1875 | C.M. Farrar | Rotary Balanced Valve | steam engine valves |
| 172,557 | Jan. 25, 1876 | F. Collignon | Steam Boiler | stationary boilers |
| 245,608 | Aug. 16, 1881 | J.J. Burk | Feeding-attachment for planing-machines | wood planers |
| 292,817 | Feb. 05, 1884 | B. Holmes, E. Holmes | Windlass for Compressing Barrels | barrel making machines |
