| All Patents in class 451/522 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 209,648 | Nov. 05, 1878 | A. Bridgman | Improvement in sandpapering-machines | sanding machines |
| 226,273 | Apr. 06, 1880 | J.L. Perry, A. Bridgman | Wood-polishing machines | drum sanders |
| 240,179 | Apr. 12, 1881 | J.L. Perry | Sanding machine | sanding machines |
| RE10,152 | Jul. 11, 1882 | A. Bridgman, J.L. Perry | Wood-polishing machine | sanding machines |
| 352,988 | Nov. 23, 1886 | J. Challoner, A. Bridgman | Drum sander | sanding machines |
| 798,455 | Aug. 29, 1905 | M.L. Schlueter | Floor-surfacing machine | sanding machines |
| 846,159 | Mar. 05, 1907 | M.V. Stone | Sandpaper-holder | |
| 1,395,880 | Nov. 01, 1921 | D.W. Ward | Commutator Brush Reseating Tool | brush reseating tools |
| 1,406,275 | Feb. 14, 1922 | C.G. Norman | Sandpapering machine | sanding machines |
| 2,179,465 | Nov. 07, 1939 | J.Y. Blazek | Crankshaft grinder | vehicle mechanic |
| 2,195,493 | Apr. 02, 1940 | E.M. McGovern, P. Schrick | Crankshaft grinder | crankshaft maintenance |
| 2,290,730 | Jul. 21, 1942 | J.Y. Blazek | Grinding device | crankshaft maintenance |
