Martin v. United States

Plaintiff alleges unauthorized use under the act of June 25,1910, 36 Stat. 851, as amended by the act of July 1, 1918, 40 Stat. 704, 705, by the War and Navy Departments of the United States of a patent granted to him in 1919, as set forth in the findings, for a certain aeroplane retractable landing gear. Defendant first filed a plea in bar claiming that if it had used any feature of plaintiff’s patent it had & license to do so. This plea was overruled without prejudice and is now renewed. The other contentions of the defendant upon which it bases its defense that plaintiff is not entitled to…