| All Patents in class 451/247 |
Patents 31 -
42
of 42
      |
| Number | Date | Patentee | Title | Type |
| 2,120,198 | Jun. 07, 1938 | R.G. Anderson, J.Y. Blazek | Valve grinder | vehicle mechanic |
| 2,135,894 | Nov. 08, 1938 | E.C. Head | Machine for forming spiral bevel gear cutters | sharpening machines |
| 2,245,654 | Jun. 17, 1941 | J.D. Rovick, J.C. Drader | Gear Lapping and Finishing Machine | gear lapping machines |
| 2,292,229 | Aug. 04, 1942 | E.C. Krueger | Splash guard for grinding machines | |
| 2,332,421 | Oct. 19, 1943 | E. Wildhaber | Method And Machine For Relieving Cutters | metal relieving machines |
| 2,604,740 | Jul. 29, 1952 | H.C. Perkins | Machine for yieldably presenting work to buffing or polishing wheels or belts | |
| 2,622,375 | Dec. 23, 1952 | W. Trible, F.S. Haas | Grinding Machine | surface grinders |
| 2,636,321 | Apr. 28, 1953 | J.C. Wilson | Machine tool | grinders |
| 2,649,668 | Aug. 25, 1953 | H.C. Perkins, C.A. Zinn | Rotary turret for multiple spindle polishing and buffing machines | |
| 3,284,959 | Nov. 15, 1966 | W.B. Seidel | Multi-Station Grinding Machine | cylindrical grinders |
| 3,434,244 | Mar. 25, 1969 | J. Decker | Grinding Machinery for Finishing Brake Discs | surface grinders |
| 4,635,405 | Jan. 13, 1987 | L.E. Stump | Continuous arcuate feed assembly | metal sanding machines |
