| All Patents in class 266/134 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 125,651 | Apr. 09, 1872 | J.A. Woodbury | Tempering the Treads of Car Wheels | railroad car wheels |
| 1,866,827 | Jul. 12, 1932 | F.J. Vlchek | Manufacture of Swaged and Tempered Articles | metalworking machines |
| 2,157,948 | May 09, 1939 | H.H. Beeny | Hardening of Metal Surfaces | flame hardening machines |
| 2,294,187 | Aug. 25, 1942 | T.A. Waltz, A. Kullman | Apparatus for Heat Treating | heat treating machines |
| 2,312,839 | Mar. 02, 1943 | T.A. Waltz, A. Kullman | Flame Hardening Of Rack Bars | heat treating machines |
| 2,412,333 | Dec. 10, 1946 | A.L. Hartley | Flame Hardening Apparatus | metalworking machines |
