|
DE679050C
|
|
Electrodynamic sound recorder
|
|
US1952357A
|
|
Electromechanical device
|
|
US1968806A
|
|
Electromagnetic phonograph recorder
|
|
US1928169A
|
|
Electric sound recorder
|
|
DE746266C
|
|
Circuit arrangement for combating resonance disturbances in electro-dynamic sound recorders
|
|
US2024271A
|
|
Moving coil electromechanical device
|
|
GB368252A
|
|
Improvements in and relating to talking machines
|
|
DE582220C
|
|
Speaking machine, in particular case speaking machine
|
|
DE538695C
|
|
Method and device for reproducing sound from sound recordings buried in records or the like
|
|
GB338360A
|
|
Improvements in carrying handles for gramophones or like portable articles
|
|
GB337900A
|
|
Improvements in or relating to enclosures or studios for the interconversion of acoustical and mechanical vibrations
|
|
GB336974A
|
|
Improvements in and relating to tone-arms or the like for gramophones and the like
|
|
GB338213A
|
|
Improvements in portable sound reproducing instruments
|
|
GB336652A
|
|
Improvements in talking machines and the like
|
|
GB335209A
|
|
Improvements in and relating to machines for pressing disc sound records
|
|
GB309873A
|
|
Improvements in and relating to talking machines
|
|
DE574484C
|
|
Tonearm
|
|
GB326931A
|
|
Improvements in and relating to supports for electrical soundreproducing devices
|
|
GB325273A
|
|
Improvements in or relating to apparatus or systems for the interconversion of acoustical and mechanical vibrations
|
|
DE548481C
|
|
Sound line for sound reproduction devices, speaking machines, loudspeakers, etc.
|
