2nd edition
2007
Reproduces the text and drawings of Conrad’s 36 U.S. patents directly related to telecommunications. Included are U.S. 1,664,192 for a wireless receiving set (a.k.a. the Aeriola Junior) and U.S. 1,853,661 for a mechanical television system.
Paperback, 188 pages, 8 1/2 x 11, $10.50.