| All Patents in class 451/306 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 179,167 | Jun. 27, 1876 | H.M. Du Bois | Improvement in polishing-machines | belt sanders |
| 330,890 | Nov. 24, 1885 | J.M. Gilbert | Polishing mechanism for turning-lathes | sanding machines |
| 386,792 | Jul. 24, 1888 | L. Switzer | Machine for polishing rods | sanding machines |
| 430,398 | Jun. 17, 1890 | J.M. Nash | Machine for smoothing curved surfaces | sanding machines |
| 624,882 | May 09, 1899 | F. Unkrich | Spoke-finishing machine | wheelwright |
| 679,611 | Jul. 30, 1901 | G.A. Ensign | Spoke-finishing machine | belt sanders |
| 719,769 | Feb. 03, 1903 | G.A. Ensign | Spoke-finishing machine | wheelwright |
| 910,634 | Jan. 26, 1909 | O. Allen | Felly-polishing machine | sanding machines |
| 960,408 | Jun. 07, 1910 | J.L. Nolan, F.C. Rowell | Abrading-machine | sanding machines |
| 980,054 | Dec. 27, 1910 | J. Hausman, J.C. Blevney | Abrasive machine | sanding machines |
| 988,071 | Mar. 28, 1911 | E.F. Beugler | Barrel-sanding machine | sanding machines |
| 2,531,921 | Nov. 28, 1950 | R.A. Schultz | Surface finishing fixture | grinders |
| 4,407,096 | Oct. 04, 1983 | C.I. Steinback | Method and apparatus for surface grinding | sanding machines |
