| All Patents in class 51/307 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 95,824 | Oct. 12, 1869 | E.C. Merrill, A.W. Willard | Improved composition for emery-wheels and other abrading-implements | grinding wheels |
| 113,439 | Apr. 04, 1871 | E.C. Merrill | Improvement in the manufacture of emery-wheels and artificial stone | grinding wheels |
| 124,558 | Mar. 12, 1872 | J.S. Elliott, J.F. Wood | Improvement in the manufacture of millstones | |
| 163,880 | Jun. 01, 1875 | S.G. Morrison | Improvement in modes of applying emery to metal surfaces | grinding wheels |
| 465,376 | Dec. 15, 1891 | A. Johnston | Means for Grinding Cutlery or Other Articles | sharpening apparatus |
| 608,877 | Aug. 09, 1898 | D.J. Lattimore | Abrading-wheel | grinding wheels |
| 3,030,198 | Apr. 17, 1962 | H.S. Kibbey | Abrasive Article | grinder wheels |
| 3,113,006 | Dec. 03, 1963 | H.S. Kibbey | Filler for Grinding Wheels | grinder wheels |
| 3,269,813 | Aug. 30, 1966 | H.S. Kibbey | Abrasive Article Containing Zirconium Tetraflouride Filler | grinder wheels |
| 3,362,802 | Jan. 09, 1968 | J.L. Ellis | Combination Machining Tool and Tool Support Having Improved Vibration Damping Characteristics | carbide inserts and holders |
| 5,536,282 | Jul. 16, 1996 | R.A. Gary, S.C. Yoon | Method for Producing an Improved Vitreous Bonded Abrasive Article and the Article Produced Thereby | grinder wheels |
| 7,429,151 | Sep. 30, 2008 | I. Hessman | Coated Inserts for Wet Milling | carbide inserts and holders |
| 7,431,542 | Oct. 07, 2008 | I. Hessman | Coated Cutting Insert | carbide inserts and holders |
