| All Patents in class 451/522 |
Patents 1 -
10
of 12
      |
| Picture | Number | Date | Patentee | Title |
 | 209,648 | Nov. 05, 1878 | A. Bridgman | Improvement in sandpapering-machines |
 | 226,273 | Apr. 06, 1880 | J.L. Perry, A. Bridgman | Wood-polishing machines |
 | 240,179 | Apr. 12, 1881 | J.L. Perry | Sanding machine |
 | RE10,152 | Jul. 11, 1882 | A. Bridgman, J.L. Perry | Wood-polishing machine |
 | 352,988 | Nov. 23, 1886 | J. Challoner, A. Bridgman | Drum sander |
| | 798,455 | Aug. 29, 1905 | M.L. Schlueter | Floor-surfacing machine |
 | 846,159 | Mar. 05, 1907 | M.V. Stone | Sandpaper-holder |
| | 1,395,880 | Nov. 01, 1921 | D.W. Ward | Commutator Brush Reseating Tool |
 | 1,406,275 | Feb. 14, 1922 | C.G. Norman | Sandpapering machine |
| | 2,179,465 | Nov. 07, 1939 | J.Y. Blazek | Crankshaft grinder |
