Patents - 1947
High frequency electronic tube
David H. Sloan
U.S. Patent 2,424,002. July 1947
Wave guide system
John R. Whinnery
U.S. Patent 2,422,058. June 1947
High frequency electronic tube
David H. Sloan
U.S. Patent 2,424,002. July 1947
Wave guide system
John R. Whinnery
U.S. Patent 2,422,058. June 1947