| All Patents in class 266/261 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 2,245,273 | Jun. 10, 1941 | A.L. Hartley | Method of Flame Hardening Lathe Beds | metal lathes |
| 2,378,001 | Jun. 12, 1945 | F.E. Drummond | Flame Hardening Torch | torches |
| 2,500,989 | Mar. 21, 1950 | A.H. Davis, A.L. Hartley, W.D. Whalen | Metallurgical apparatus | flame hardening machines |
| 2,523,883 | Sep. 26, 1950 | M. Garvin, D.M. Strauchen | Heat Treating Machine | heat treating machines |
| 2,555,517 | Jun. 05, 1951 | M. Garvin, D.M. Strauchen | Automatic Heat Treating Machine | heat treating machines |
| 2,621,717 | Dec. 16, 1952 | M. Garvin, D.M. Strauchen | Annular Torch Head for Flame Hardening Machines | flame hardening machines |
| 4,065,249 | Dec. 27, 1977 | J.W. Nelson | Heater for billets | |
