| All Patents in class 451/123 |
Patents 1 -
15
of 16
      |
| Number | Date | Patentee | Title | Type |
| 370,003 | Sep. 13, 1887 | C.M. Brown | Grinding Lathe | cylindrical grinders |
| 441,570 | Nov. 25, 1890 | R.B. Leighton | Lens Grinding Machine | material grinding machines |
| 498,240 | May 30, 1893 | R. Conrader | Reamer Grinding Machine | tool grinders |
| 508,196 | Nov. 07, 1893 | T.A. Willson, H. Bilgram | Machine for grinding the edges of spectacle or eyeglass lenses | |
| 612,239 | Oct. 11, 1898 | L.E. Harper, C.L. Grohmann | Machine for dressing metals or other materials | bicycle machinery |
| 839,080 | Dec. 18, 1906 | C.O. Smith | Machine for grinding ball bearing races | grinders |
| 1,522,465 | Jan. 06, 1925 | G.C. Kimmel | Internal Grinding Machine | internal grinders |
| 1,972,623 | Sep. 04, 1934 | R.E. Harrison | Grinding Machine | grinding machines |
| 2,006,554 | Jul. 02, 1935 | C. Herfurth | Grinding Machine | grinding machines |
| 2,135,894 | Nov. 08, 1938 | E.C. Head | Machine for forming spiral bevel gear cutters | sharpening machines |
| 2,142,285 | Jan. 03, 1939 | H. Pelphrey | Hob and Method of Manufacture | gear cutting tools |
| 2,254,020 | Aug. 26, 1941 | A.J. Graf, C.L. Schulte | Cambering Mechanism for Grinding Machines | grinding machines |
| 2,408,949 | Oct. 08, 1946 | H. Pelphrey | Hob Grinder | tool grinders |
| 2,425,859 | Aug. 19, 1947 | O.M. Braaten | Cutter Grinder | tool grinders |
| 2,978,843 | Apr. 11, 1961 | B.H. Johnson, F.E. Birtch | Apparatus for Grinding Double-Enveloping Worm Elements | gear grinding machines |
