BOOTH, Circuit Judge.
This is a patent suit in conventional form. The main defense relied upon is invalidity of the patent for lack of invention.
The patent involved is No. 1,665,715, issued April 10, 1928, to Ole P. Noisom; application filed May 8, 1926. It covers a compass indicator for automobiles, etc.
The patent includes four claims, but only the fourth is here involved. That claim reads as follows: "4. In direction indicators for conveyances...
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