|
GB489174A
|
|
Improvements in or relating to aerial systems for wireless reception and transmission
|
|
GB476235A
|
|
Improvements in or relating to aerial systems for wireless reception and transmission
|
|
US1988522A
|
|
Optical projection cabinet
|
|
GB375231A
|
|
Improved coupling between the winding shaft and winding handle of talking machines
|
|
GB377871A
|
|
Improvements in and relating to kerr cells
|
|
GB383063A
|
|
Improvements in or relating to resistance elements for use in variable electrical resistance devices
|
|
GB381708A
|
|
Improvements in talking machine sound reproducers
|
|
GB388759A
|
|
Improvements in or relating to kinematograph apparatus
|
|
US1962417A
|
|
Carrier wave television system
|
|
GB388404A
|
|
Improvements in or relating to television and the like systems
|
|
US2085571A
|
|
Reproduction of sound with the aid of light
|
|
DE567950C
|
|
Automatic speaking machine with a stack of records arranged above the turntable
|
|
GB384694A
|
|
Improvements in or relating to transparent films, for use, for example, as the surfac
|
|
GB377809A
|
|
Improvements in or relating to the manufacture of thermoplastic materials or articles comprising a cellulose derivative
|
|
ES123457A1
|
|
Improvements in talking machines.
|
|
ES123361A1
|
|
Improvements in the apparatus for the reproduction of sound with the help of light.
|
|
GB376927A
|
|
Improved lid stay
|
|
GB371952A
|
|
Improvements in or relating to apparatus for the electrical reproduction of marking such as sound or picture records with the aid of light
|
|
GB380459A
|
|
Improvements in or relating to alternating current motors
|
|
ES123159A1
|
|
Perfection on discs for sound reproduction.
|
