| All Patents in class 451/449 |
Patents 16 -
30
of 31
      |
| Number | Date | Patentee | Title | Type |
| 1,782,235 | Nov. 18, 1930 | J.B. Armitage, E.J. Kearney | Machine Tool Organization | milling machines |
| 1,922,246 | Aug. 15, 1933 | A.M. Johnson | Machine tool | honing machines |
| 2,069,097 | Jan. 26, 1937 | P.H. Root | Knife grinder | sharpening machines |
| 2,070,811 | Feb. 16, 1937 | B. Sassen | Thermally Conditioned Machine Tool | milling machines |
| 2,254,240 | Sep. 02, 1941 | E.A. Overstedt | Machine for Finishing Gears | gear making machines |
| 2,377,271 | May 29, 1945 | R. Schümann | Flexible Shaft And Air-Cooled Hand Piece | handheld power tool accessories |
| 2,396,147 | Mar. 05, 1946 | W.G. Baldenhofer | Cooling System for Hydraulically-Operated Machine Tools | hydraulic apparatus |
| 2,452,268 | Oct. 26, 1948 | R. Schümann | Motor Hand Tool Assembly | handheld grinders |
| 2,478,074 | Aug. 02, 1949 | K.C. Atkin | Sanding machine | handheld power sanders |
| 2,562,229 | Jul. 31, 1951 | R.M. Bell | Belt grinding machine | sanding machines |
| 2,935,824 | May 10, 1960 | P.J. Robischung | Machine tool | |
| 3,046,710 | Jul. 31, 1962 | J. Decker, G.L. Grove | Cooling Device for Machine Tool Member | coolant apparatus |
| 3,448,023 | Jun. 03, 1969 | R.M. Bell | Belt type electro-chemical (or electrolytic) grinding machine | |
| 4,642,943 | Feb. 17, 1987 | J.R. Taylor, Jr. | Belt abrading apparatus and method | metal sanding machines |
| 4,664,165 | May 12, 1987 | J.W. Mauger, H. Pollak | Surface mounted power tool | jointers |
