GRAHAM, Presiding Judge.
The appellant filed an application for a patent on improvements in rolled steel shapes, such as are used for traction lugs upon the wheels of vehicles, particularly tractors. The appellant's device is sufficiently described by claim 4, which is as follows: "4. A traction lug characterized as being formed of rolled steel with lateral wings and with parts projected from inner edges of the wings at inclinations thereto and forming an inverted...
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