| All Patents in class 148 |
Patents 31 -
45
of 46
      |
| Number | Date | Patentee | Title | Type |
| 1,008,261 | Nov. 07, 1911 | A.A. Harvie | Hardened Corners Process | carpenter squares |
| 1,253,966 | Jan. 15, 1918 | F.W. Harris | Process and Apparatus for Treating Drill Pipe | oilfield machinery |
| 1,265,944 | May 14, 1918 | C. Napier | Process of and Apparatus for Heat Treatment of Metal Objects | heat treating machines |
| 1,333,767 | Mar. 16, 1920 | C. Napier | Method of making tempered blades | making sawblades |
| 1,867,527 | Jul. 12, 1932 | T.E. Dunn | Process for Anodic Removal of Surface Metal Film | |
| 2,138,811 | Dec. 06, 1938 | P.A. Abe | Surface Hardening Lathe Bed | flame hardening machines |
| 2,154,947 | Apr. 18, 1939 | H.H. Beeny, A.H. Lloyd | Hardening Metal Surfaces | flame hardening machines |
| 2,157,948 | May 09, 1939 | H.H. Beeny | Hardening of Metal Surfaces | flame hardening machines |
| 2,245,273 | Jun. 10, 1941 | A.L. Hartley | Method of Flame Hardening Lathe Beds | metal lathes |
| 2,268,053 | Dec. 30, 1941 | F.P. Miller, W.A. Reese | Heat treatment of high-speed steel | heat treating machines |
| 2,312,839 | Mar. 02, 1943 | T.A. Waltz, A. Kullman | Flame Hardening Of Rack Bars | heat treating machines |
| 2,361,995 | Nov. 07, 1944 | F.W. Curtis | Method of Making Metal Cutting Tools | milling machine cutters |
| 2,462,072 | Feb. 22, 1949 | F.N. Darmara | Process of Inductively Heating Pliers | making pliers |
| 2,614,441 | Oct. 21, 1952 | E.A. Goddard | Cutter and method of forming the same | metal cutting circular saw blades |
| 2,786,788 | Mar. 26, 1957 | W.T. Anderson | High speed tool steel saw band and method of making the same | sawblades |
