| Patents Granted on 1939-04-04 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| CA-380,481 | Apr. 04, 1939 | J.T. Hepburn | Lathe | metal lathes |
| CA-380,482 | Apr. 04, 1939 | J.T. Hepburn | Lathe | metal lathes |
| CA-380,483 | Apr. 04, 1939 | J.T. Hepburn | Lathe | metal lathes |
| CA-380,484 | Apr. 04, 1939 | J.T. Hepburn | Lathe tool feeding device | metal lathes |
| 2,152,729 | Apr. 04, 1939 | C.C. Chartier | Universal Tool Sharpening and Work Holder | sharpening tool holders |
| 2,152,781 | Apr. 04, 1939 | D.D. Wile | Control Device | temperature controls |
| 2,152,837 | Apr. 04, 1939 | E. Cannon | Prefill valve for hydraulic presses | hydraulic metalworking presses |
| 2,152,880 | Apr. 04, 1939 | F. Doepke, estate of (deceased), C.R. Dowdy | Thickness Gauge | measurement gauges |
| 2,152,906 | Apr. 04, 1939 | H.G. Miller | Band saw guide | bandsaw guides |
| 2,152,969 | Apr. 04, 1939 | W.W. Nash | Balancer | handheld power tool accessories |
| 2,153,054 | Apr. 04, 1939 | H.J. Smith | Die stock and tap wrench | taps and dies |
| 2,153,463 | Apr. 04, 1939 | C.L. Grover | Index Plate for Boring and Milling Machines | metalworking machine mechanisms |
| 2,153,502 | Apr. 04, 1939 | W.F. Ocenasek | Apparatus for bench grinding long blades | cutter grinding |
