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US2313290A
|
|
Apparatus for transforming oscillations
|
|
US2312996A
|
|
System for controlling the temperature in the interior of vehicles
|
|
GB369491A
|
|
Improvements in or relating to flexible valves for piston type compressors
|
|
GB362277A
|
|
Improvements in and relating to loud speakers, microphones or like apparatus for transforming electric vibrations into sounds and vice versa
|
|
GB365392A
|
|
Improvements in apparatus for regulating the volume of sound produced in gramophones and similar apparatus employing electric amplifiers
|
|
GB366253A
|
|
Improvements in or relating to flexible valves for piston type compressors
|
|
GB367119A
|
|
Improvements in loud-speakers
|
|
GB343820A
|
|
Improvements in or relating to speed governors for electric driving motors for gramophones and the like
|
|
US1859125A
|
|
Means for the protection of electrical apparatus
|
|
US1908880A
|
|
Alternating current electric motor for phonographs and the like
|
|
GB342427A
|
|
An electric motor for phonographs and the like
|
|
GB312689A
|
|
Improvements in oscillating circuits applied to electrical musical instruments
|
|
US1809503A
|
|
Oscillating circuits applied to electrical musical instruments and the like
|
|
GB311426A
|
|
Improvements in and relating to servo devices for automobile vehicles
|
|
US1917488A
|
|
Electric servo-motor for automobiles or the like
|
|
US1865428A
|
|
Electric piano harp
|
|
US1912752A
|
|
Receiver
|
|
US1904607A
|
|
Stray and atmospherics eliminating system
|
|
US1789032A
|
|
Electric organ
|
|
GB310953A
|
|
An electric musical instrument of piano or harp like quality
|
