Improvements in or relating to a process and arrangement for the production of soundmotion picture films having magnetic sound track
GB729313A
Improvements in or relating to electric film driving apparatus
US2730322A
Mounting racks for electroacoustic apparatus
US2810020A
Magnetic head for sound-recording apparatus and the like
US2717283A
Sound film apparatus and the like
US2668880A
Apparatus for stereophonic sound-recording
GB692526A
Improvements in or relating to arrangements for automatic amplitude regulation, especially dynamic regulation, in an electric transmission system
US2697812A
Automatic amplitude regulation in electrical transmission system and apparatus
GB696242A
Improvements in or relating to a mixing arrangement for alternating currents
GB692377A
Improvements in or relating to an arrangement for supervising a mixing console comprising a number of channels
GB684895A
Improvements in or relating to thermionic valve amplifiers
GB700630A
Improvements in or relating to a method of and means for the stereophonic recording of sound
GB686881A
Improvements in or relating to guiding arrangements for magnetic record tapes
GB689935A
Improvements in or relating to a method of producing kinematograph films for photographic recording of images and magnetic recording of sound
DE882576C
Frame for electro-acoustic devices, especially amplifiers
DE836500C
Spring-loaded suspension, especially for sensitive electrical or acoustic parts, e.g. Microphones
DE859818C
Method and device for regulating the amplitude of an audio frequency voltage and a control voltage corresponding to it, preferably for optical sound recording with pure tone control
DE853524C
Method and apparatus for the photographic processing of picture sound films with a magnetic sound track
DE1153795B
Arrangement for magnetic recording, preferably the signals from television pictures
DE968270C
Method of copying and apparatus for the transfer of the image by photographic exposure in the same pass as the sound onto image-sound films with magnetic sound recording
