Kock 1951
Winston E. Kock, Basking Ridge, N.J., assigned rights to Bell Telephone Labs., N.Y. "Directional Transducer"

Kock 1951

  You don't have a pdf plugin, but you can download the pdf file.

Filed: December 12, 1951
U.S. Patent 2,796,467
Granted: June 18, 1957

Winston E. Kock, Basking Ridge, N.J., assigned rights to Bell Telephone Labs., N.Y.
"Directional Transducer"

Referenced by Walker and Williamson in U.S. Pats. 3,008,013 & 3,008,014.