Patents:

*U.S. Patent No. 3,319,175 , 05/09/1967 (app. 07/27/1964, serial 385,530) ELECTRONIC AMPLIFIER WITH POWER SUPPLY SWITCHING (class: 330/297; 327/535; 327/576; 330/123; 330/127; 330/263) Dryden, Hugh L, Deputy Admininistrator of the National Aeronautics and Space Administration, with respect to an invention of Kramer, Manuel of South Lincoln, MA [DjVu165KB] [Comments]