| All Patents in class 451/363 |
Patents 46 -
51
of 51
      |
| Number | Date | Patentee | Title | Type |
| 2,416,493 | Feb. 25, 1947 | H.S. Newton | Sanding belt machine | sanding machines |
| 2,489,811 | Nov. 29, 1949 | H.C. Perkins | Belt polishing and grinding machine | sanding machines |
| 2,507,677 | May 16, 1950 | J.F. Harper, P.R. Nickerson, C.I. Packer | Polishing machine | belt sanders |
| 2,561,936 | Jul. 24, 1951 | E.L. McFerren | Way Grinding Machine | surface grinders |
| 2,590,992 | Apr. 01, 1952 | J. McEwan | Saw sharpener | saw sharpening machines |
| 2,753,668 | Jul. 10, 1956 | J.J. Strnad | Surface grinder | gasket surface maintenance |
