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US2609457A
|
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Electromagnetic sound recorder and reproducer
|
|
US2265879A
|
|
Method of and means for electromagnetically recording and reproducing sound
|
|
US1960094A
|
|
Process for recording and reproducing
|
|
GB313504A
|
|
Improvements in transmitting and receiving apparatus for use in television and telecinematography
|
|
GB303178A
|
|
Improvements in or relating to television or like receiving apparatus
|
|
GB298988A
|
|
An improved electric alternator for use especially as an amplifier
|
|
GB308156A
|
|
An improved electro-mechanical amplifier
|
|
US1780572A
|
|
Optical device for radio cinematographic transmitters and receivers
|
|
DE517568C
|
|
Photoelectric multi-cell panel
|
|
GB291365A
|
|
Improvements in or relating to apparatus for use in television
|
|
US1771360A
|
|
Electromagnetic apparatus for the transmission of images
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