| All Patents in class 451/406 |
Patents 16 -
30
of 33
      |
| Number | Date | Patentee | Title | Type |
| 734,799 | Jul. 28, 1903 | J.S. Bancroft | Tool Grinding Machine | tool grinders |
| 735,254 | Aug. 04, 1903 | J. Hartness | Metal Working Machine | metal lathe accessories and attachments |
| 809,822 | Jan. 09, 1906 | C.H. Lawton | Holder for Rotary Tool Operating Machines | tool holders |
| 982,166 | Jan. 17, 1911 | A.A. Wood | Grinding-Machine | sharpening machines |
| 1,081,465 | Dec. 16, 1913 | J.F. Pribnow | Emery-wheel bench-grinder | bench or pedestal grinders |
| 1,192,865 | Aug. 01, 1916 | W.W. Cheney | Grinder | sharpeners |
| 1,290,896 | Jan. 14, 1919 | W.L. Bryant | Machine for grinding metal | cylindrical grinders |
| 1,351,908 | Sep. 07, 1920 | A.F. Howe | Safety-guard for rotary grinding machines | bench or pedestal grinders |
| 1,978,110 | Oct. 23, 1934 | B.A. Kearns | Grinding Machinery | grinding machines |
| 2,052,031 | Aug. 25, 1936 | W.J. Merrigan | Combination grinder and sander | sanding machines |
| 2,674,070 | Apr. 06, 1954 | V.L. Brown, T.B. Thomas | Belt sander | belt sanders |
| 2,730,843 | Jan. 17, 1956 | H. Ernst | Cambering Mechanism | roll grinding machines |
| 2,835,289 | May 20, 1958 | G.E. Rockwell | Multi-tool power driven wood working machine | combination machines |
| 3,094,817 | Jun. 25, 1963 | J.S. Bartholomew | Centerless Grinding Machine | centerless grinders |
| 3,115,729 | Dec. 31, 1963 | E.F. Render | Centerless Grinding Machine | centerless grinders |
