MR. CHIEF JUSTICE TAFT delivered the opinion of the Court.
This was a suit to enjoin the infringement of a patent for an improvement in auxiliary windshields for automobiles. It was brought on a reissued patent. The reissue was granted on the ground that the original patent was inoperative to protect the real invention due to defective and insufficient and too narrow claims, all of which arose through inadvertence and mistake due to misunderstanding between the inventor...
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