| All Patents in class 451/150 |
Patents 1 -
15
of 23
      |
| Number | Date | Patentee | Title | Type |
| 129,548 | Jul. 16, 1872 | J.J. Grant | Improvement in devices for grinding rotary cutters | cutter grinding |
| 130,741 | Aug. 20, 1872 | J.M. Poole | Improvement in Machines for Grinding Objects Cylindrical | cylindrical grinders |
| 193,715 | Jul. 31, 1877 | R. Binns, E.E. Latham | Machines for Grinding Calender Rolls | roll grinding machines |
| 194,001 | Aug. 07, 1877 | W.G. Gibbons, T.H. Savery | Roll Grinding and Finishing Machine | roll grinding machines |
| 341,939 | May 18, 1886 | J.M. Petersen | Machine for Fittin Band Saws for Brazing | bandsaw brazing and welding machines |
| 407,721 | Jul. 23, 1889 | J.D. Cox, Jr. | Machine for back-clearing twist-drills | tool making machines |
| 450,337 | Apr. 14, 1891 | L.E. Paine | Combined sandpapering and friezing machine | sanding machines |
| 471,380 | Mar. 22, 1892 | P. Forg | Grinding Attachment | grinding attachments |
| 523,882 | Jul. 31, 1894 | M. Covel | Saw Dressing Machine | saw sharpening tools |
| 774,030 | Nov. 01, 1904 | L.B. Benton | Grinding Machine | tool grinders |
| 856,662 | Jun. 11, 1907 | G.W. Smith | Face-mill grinder | tool grinders |
| 1,149,533 | Aug. 10, 1915 | F.R. Patch | Coping Head | stone cutting machines |
| 1,614,304 | Jan. 11, 1927 | G.T. Johnson | Hollow-chisel mortiser | mortising machines |
| 1,771,602 | Jul. 29, 1930 | R.S. Jackson, E.P. Armstrong | Grinder for Concave Saw Teeth | saw sharpening machines |
| 1,794,758 | Mar. 03, 1931 | I.F. Ditmar | Sawing machine | circular saws |
