| All Patents in class 266/125 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
 | 2,247,494 | Jul. 01, 1941 | A.L. Hartley | Flame hardening apparatus |
 | 2,264,752 | Dec. 02, 1941 | W.F. Groene | Flame Hardening Machine |
| | 2,294,187 | Aug. 25, 1942 | T.A. Waltz, A. Kullman | Apparatus for Heat Treating |
| | 2,378,890 | Jun. 26, 1945 | M.A. Crosby, H.H. Brown, P.A. Abe | Surface Hardening Metal Areas of Limited Size |
| | 2,523,883 | Sep. 26, 1950 | M. Garvin, D.M. Strauchen | Heat Treating Machine |
| | 2,555,517 | Jun. 05, 1951 | M. Garvin, D.M. Strauchen | Automatic Heat Treating Machine |
| | 2,665,126 | Jan. 05, 1954 | E.G. Roehm | Crankshaft Pin Hardening Machine |
