| All Patents in class 266 |
Patents 31 -
42
of 42
      |
| Number | Date | Patentee | Title | Type |
| 2,157,948 | May 09, 1939 | H.H. Beeny | Hardening of Metal Surfaces | metalworking machines |
| 2,220,002 | Oct. 29, 1940 | H.M. Binns, W.A. Maddox, M. Rollman | Heat Treating | heat treating machines |
| 2,245,273 | Jun. 10, 1941 | A.L. Hartley | Method of Flame Hardening Lathe Beds | metal lathes |
| 2,264,752 | Dec. 02, 1941 | W.F. Groene | Flame Hardening Machine | metalworking machines |
| 2,361,995 | Nov. 07, 1944 | F.W. Curtis | Method of Making Metal Cutting Tools | milling machine cutters |
| 2,378,001 | Jun. 12, 1945 | F.E. Drummond | Flame Hardening Torch | torches |
| 2,378,890 | Jun. 26, 1945 | M.A. Crosby, H.H. Brown, P.A. Abe | Surface hardening metal areas of limited size | |
| 2,412,333 | Dec. 10, 1946 | A.L. Hartley | Flame Hardening Apparatus | metalworking machines |
| 2,462,072 | Feb. 22, 1949 | F.N. Darmara | Process of Inductively Heating Pliers | making pliers |
| 2,895,386 | Jul. 21, 1959 | T.C. Mann | Profiling machine | routing machines |
| 4,065,249 | Dec. 27, 1977 | J.W. Nelson | Heater for billets | |
| 4,125,365 | Nov. 14, 1978 | J.W. Nelson | Roll through billet heater | |
