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ed 02/28/2003: First push-pull amplifier
*U.S. Patent No. 1,173,079
, 02/22/1916 (app. 10/29/1913, serial 797,998) SELECTIVE TUNING SYSTEM (class: 455/291; 313/298; 329/349; 455/307) Alexanderson, Ernst F. W. of Schenectady, NY (assignee: General Electric Company of New York) [DjVu225KB] [Comments]
*U.S. Patent No. 1,752,247
, 03/25/1930 (app. 04/18/1929, serial 356,223) CONVERTING APPARATUS (class: 363/121; 307/107; 331/130; 331/131) Fitz Gerald, Alan S. of Schenectady, NY (assignee: General Electric Company, Inc. of NY) [DjVu71KB] [Comments]
*U.S. Patent No. 1,874,159
, 08/30/1932 (app. 09/26/1930, serial 484,627) ELECTRIC AMPLIFYING CIRCUITS (class: 330/10; 330/122; 330/147; 330/207A; 363/121) Bedford, Burnice D. of Schenectady, NY (assignee: General Electric Company, Inc. of New York) [DjVu136KB] [Comments]
*U.S. Patent No. 1,902,495
, 03/21/1933 (app. 08/08/1930, serial 473,913) ELECTRIC POWER CONVERTING APPARATUS (class: 363/121; 315/187; 315/230) Fitz Gerald, Alan S. of Wynnewood, PA (assignee: General Electric Company, Inc. of NY) [DjVu80KB] [Comments]
*U.S. Patent No. 2,511,663
, 06/13/1950 (app: 12/29/1945 - serial: 638,378) MAGNETIC PHONOGRAPH PICKUP (class: 369/149; 310/25; 336/135; 369/170) Bachman, William S. of Southport, CT (assignee: General Electric Company of New York) [DjVu191KB]
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