| All Patents in class 451/178 |
Patents 16 -
21
of 21
      |
| Number | Date | Patentee | Title | Type |
| 2,496,663 | Feb. 07, 1950 | F.A. Fritzsch | Metal Working Apparatus | metal lathe mechanisms |
| 2,616,225 | Nov. 04, 1952 | J.F. Smole, J.F. Smole | Hone driving machine | cylinder maintenance |
| 2,686,992 | Aug. 24, 1954 | I.A. Rimmel, E.T. Kindt | Combination spindle machine | sanding machines |
| 2,688,211 | Sep. 07, 1954 | J.J. Strnad | Expansible-tool driving machine | vehicle mechanic |
| 2,791,067 | May 07, 1957 | J.J. Falls | Grinding apparatus | bench or pedestal grinders |
| 3,006,222 | Oct. 31, 1961 | J. McEwan | Apparatus for sharpening chain saws | |
