| All Patents in class 451/114 |
Patents 1 -
15
of 18
      |
| Number | Date | Patentee | Title | Type |
| 98,850 | Jan. 18, 1870 | H. Harpin, J. Coulter | Stone Dressing Machine | stone dressing machines |
| 282,761 | Aug. 07, 1883 | J.T. Obenchain | Machine for Facing Millstones | miller |
| 527,748 | Oct. 16, 1894 | W.H. Hill | Grinding Mechanism | valve reseating machines |
| 616,649 | Dec. 27, 1898 | O.J. Beale | Device for generating gear-teeth | gear making machines |
| 911,809 | Feb. 09, 1909 | C.M. Conradson | Art of Grinding Ground Glass Bottle Necks and Stoppers Therefor | |
| 1,444,100 | Feb. 06, 1923 | F.H. Bierman | Lawn-mower-sharpening machine | sharpening machines |
| 1,708,491 | Apr. 09, 1929 | C.R. Alden | Method of finishing ball bearings | industrial machine bearings |
| 1,866,794 | Jul. 12, 1932 | F.H. Bierman | Lawn mower sharpening machine | sharpening machines |
| 1,878,603 | Sep. 20, 1932 | A.E. Robinson | Lapping Machine | gear lapping machines |
| 1,916,117 | Jun. 27, 1933 | A.E. Robinson | Lapping Machine | gear lapping machines |
| 1,916,118 | Jun. 27, 1933 | W.G. Hoelscher, A.E. Robinson | Lapping Machine | gear lapping machines |
| 1,989,651 | Jan. 29, 1935 | R.S. Drummond | Method of finishing gears | gear making machines |
| 2,085,850 | Jul. 06, 1937 | W.H. Bock, J.C. Drader | Gear Speeder | gear measuring machines |
| 2,111,045 | Mar. 15, 1938 | R.S. Drummond | Lapping machine | gear making machines |
| 2,245,654 | Jun. 17, 1941 | J.D. Rovick, J.C. Drader | Gear Lapping and Finishing Machine | gear lapping machines |
