| All Patents in class 451/231 |
Patents 16 -
25
of 25
      |
| Number | Date | Patentee | Title | Type |
| 1,979,140 | Oct. 30, 1934 | L.G. Casey | Cutting-off machine | |
| 2,107,566 | Feb. 08, 1938 | R.D. Gardner | Abrasive-sawing machine | metal sawing machines |
| 2,214,141 | Sep. 10, 1940 | A.W. Mall | Rail slotter | |
| 2,318,456 | May 04, 1943 | A.N. Blum | Cutting chain sharpener | bench or pedestal grinders |
| 2,340,553 | Feb. 01, 1944 | W.F. Obear, E.F. Obear | Abrasive cutoff machine | metal cutting circular saws |
| 2,347,223 | Apr. 25, 1944 | H.E. Tautz | Cutting machine | circular saws |
| 2,353,590 | Jul. 11, 1944 | E. Schutz | Cutting machine | |
| 2,459,233 | Jan. 18, 1949 | A.W. Mall | Saw sharpener | sharpening machines |
| 2,534,941 | Dec. 19, 1950 | W.G. Baldenhofer | Method and apparatus for grinding | profile and contour grinders |
| 4,833,831 | May 30, 1989 | W.T. Armstrong, Jr. | Apparatus and Method for Sizing and Finishing Fixed Jaw Openings of Open-Ended Wrenches | wrench components |
