| All Patents in class 451/227 |
Patents 16 -
26
of 26
      |
| Number | Date | Patentee | Title | Type |
| 1,918,147 | Jul. 11, 1933 | B.F. Stowell | Carriage positioning mechanism for grinding machines | grinders |
| 1,926,603 | Sep. 12, 1933 | B.F. Stowell | Automatic feed for grinding machines | grinders |
| 2,024,283 | Dec. 17, 1935 | F.M. Gertiser | Grinding Machine | grinding machines |
| 2,036,658 | Apr. 07, 1936 | B.F. Stowell | Automatic grinding machine | grinders |
| 2,045,894 | Jun. 30, 1936 | G.W. Binns | Grinding Machine | grinding machines |
| 2,076,508 | Apr. 06, 1937 | F.D. Van Norman | Oscillating grinder | grinders |
| 2,149,409 | Mar. 07, 1939 | F.D. Van Norman, B.F. Stowell, R.S. Pyne | Oscillating grinder | grinders |
| 2,381,687 | Aug. 07, 1945 | E.A. Allen, R.S. Pyne | Drive for oscillating grinders | grinders |
| 2,526,844 | Oct. 24, 1950 | H.P. Boggis | Tap grinding machine | cutter grinding machines |
| 2,584,499 | Feb. 05, 1952 | R.S. Pyne | Apparatus for precision bore grinding | grinders |
| 3,037,428 | Jun. 05, 1962 | H.J. Flair | Automatic milling machine | milling machines |
