Magnetic recording system

Memory dial for teletypewriter subscribers

Message network for the transmission of digital telegrams with a

Metal coating for video discs

Method and apparatus for combining video images with proper occl

Method and apparatus for effecting digital signalling over telev

Method and apparatus for engraving elemental areas of controlled

Method and apparatus for examining the interior of a bore hole a

Method and apparatus for generating line-by-line picture signal

Method and apparatus for improving acousto-electric scanning

Method and apparatus for improving photomechanical reproduction

Method and apparatus for processing the information content of a

Method and apparatus for recording and/or reproducing a video si

Method and apparatus for simultaneously modulating with picture,

Method and apparatus for stabilized reproduction of remotely-sen

Method and apparatus for time compression of facsimile transmiss

Method and arrangement for eliminating flicker in interlaced ord

Method and arrangement for scanning a sequence of images

Method and circuit arrangement for the transmission of data sign

Method and circuit arrangement for the transmission of data sign