United States Patent 2295023
Inventors:
Arnold, Beatty William
Kumar, Chatterjea Prafuila
Publication Date:
09/08/1942
Assignee:
INT STANDARD ELECTRIC CORP
Other Classes:
348/E05.013, 348/E07.027, 348/E05.070, 348/E11.007, 348/E05.012, 348/E07.040, 348/495
International Classes:
H04N5/067; H04N5/16; H04N7/04; H04N7/084; H04N11/06