| All Patents in class 451/380 |
Patents 1 -
15
of 34
      |
| Number | Date | Patentee | Title | Type |
| 40,838 | Dec. 08, 1863 | J.A. Hendrick | Improvement in Machines for Grinding and Polishing Tools | tool grinders |
| 196,183 | Oct. 16, 1877 | J.A. Bidwell | Die Grinding Machine | die grinding machines |
| 299,433 | May 27, 1884 | A. Coventry, W.F. Smith | Machinery for Grinding or Sharpening Drills | drill grinders |
| 359,943 | Mar. 22, 1887 | G.H. Smith | Attachment for Grinding Machines | grinding attachments |
| 359,964 | Mar. 22, 1887 | R. Dutton | Machine for grinding mower-knives | sharpeners |
| 364,353 | Jun. 07, 1887 | R. Kampfe | Machinery for Grinding Cutlery | glass grinding machines |
| 411,845 | Oct. 01, 1889 | O.S. Walker | Drill-grinding machine | sharpening machines |
| 422,874 | Mar. 04, 1890 | L.B. Benton | Tool Grinder | tool grinders |
| 535,021 | Mar. 05, 1895 | E. Rivett | Tool Holder and Rest Therefor | lathe tool holders and tool posts |
| 542,099 | Jul. 02, 1895 | B. Bloomheart, W.F. Nichols | Grinding Apparatus | grinders |
| 543,458 | Jul. 30, 1895 | J. Berry | Machine for Sharpening Insertable Saw Teeth | saw sharpening machines |
| 575,737 | Jan. 26, 1897 | A.S. Robinson | Machine for grinding knives of cutter-bars | sharpeners |
| 636,540 | Nov. 07, 1899 | S.E. Louden | Device for Holding Lawn Mower Cutters for Sharpening | metal lathe accessories and attachments |
| 904,817 | Nov. 24, 1908 | F. Stutzman | Universal grinding-machine | bench or pedestal grinders |
| 941,272 | Nov. 23, 1909 | W.J. Powell | Tool Holder | tool holders |
