| All Patents in class 451/216 |
Patents 1 -
10
of 22
      |
| Picture | Number | Date | Patentee | Title |
 | 6,949 | Dec. 11, 1849 | J. Vaughan, Jr. | Machine for Grinding or Polishing Tools |
 | 197,711 | Nov. 27, 1877 | E.J. Worcester | Improvement in machines for grinding lawn-motor cutter |
 | 248,744 | Oct. 25, 1881 | B. Holmes | Machine for grinding steel bars |
| | 286,663 | Oct. 16, 1883 | H.F. Wheeler | Grinding Machine for Producing the Relief on Twist and Fluted Drills |
| | 299,433 | May 27, 1884 | A. Coventry, W.F. Smith | Machinery for Grinding or Sharpening Drills |
| | 364,353 | Jun. 07, 1887 | R. Kampfe | Machinery for Grinding Cutlery |
| | 607,628 | Jul. 19, 1898 | F.A. Shea, Administrator, M. Reece, administrator, J. Reece, Estate of (deceased) | Machine for Foming Irregular Cam Grooves |
 | 1,515,568 | Nov. 11, 1924 | R.W. Ellingham, G.W. Fleming | Grinding machine |
| | 1,666,500 | Apr. 17, 1928 | N.I. Lundberg | Metal Working Tool |
| | 1,794,271 | Feb. 24, 1931 | H.H. Asbridge | Grinding machine |
