| All Patents in class 451/342 |
Patents 31 -
45
of 51
      |
| Number | Date | Patentee | Title | Type |
| 1,782,480 | Nov. 25, 1930 | E.R. Seward | Centerless Grinding Machine | grinding machines |
| 1,794,149 | Feb. 24, 1931 | J.G. Collins | Stand and control means for electric portable drills | |
| 1,976,110 | Oct. 09, 1934 | G.W. Binns | Grinding Machine | grinding machines |
| 2,009,809 | Jul. 30, 1935 | A.S. Littlejohn | Tool Holder for Machine for Culinary Purposes | kitchen tool holders |
| 2,025,714 | Dec. 31, 1935 | G.W. Binns | Grinding Machine | grinding machines |
| 2,106,033 | Jan. 18, 1938 | A.W. Mall | Terrazzo grinding apparatus | |
| 2,286,292 | Jun. 16, 1942 | A.W. Mall | Spindle assembly | |
| 2,290,215 | Jul. 21, 1942 | S.L. Stenberg | Tool Holder for Machine Tools | metalworking machine tool holders |
| 2,295,282 | Sep. 08, 1942 | A.W. Mall | Resilient mounting for abrasive wheels | |
| 2,391,388 | Dec. 25, 1945 | E.J. Bullard | Grinding and Lapping Machine | lapping machines |
| 2,562,327 | Jul. 31, 1951 | J.C. Moore | Mandrel | grinders |
| 2,586,530 | Feb. 19, 1952 | J.H. Godfrey | Saw blade holding means | handheld circular saws |
| 2,745,229 | May 15, 1956 | S.G. Brady | Liquid Cooled Grinder Wheel | grinder wheels |
| 2,810,239 | Oct. 22, 1957 | A.C. Burleigh | Holder for abrasive disk | handheld power sanders |
| 2,920,894 | Jan. 12, 1960 | H.C. Kreinick | Quick Acting Tool Holder | metalworking machine tool holders |
