Electrooptical apparatus
475,008. Copying-telegraphy. STANDARD TELEPHONES & CABLES, Ltd. Nov. 27, 1936, No. 32555. Convention date, Dec. 18, 1935. [Class 40 (iii)] A carrier modulated by image currents and accompanied by the image currents, and unaccompanied image currents are produced, and the two sets of currents are...
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