DK43950C
(en )
1931-04-07
Device for Sound Reproduction Systems.
DK43148C
(en )
1930-10-13
Device for Sound Reproduction Systems.
SU16442A1
(en )
1930-08-31
Device for reproducing sound during film projection
SU24412A1
(en )
1931-12-31
Sound attenuator for typewriters
DK34401C
(en )
1925-04-14
Device for Photographic Writing Down Sound.
DK34348C
(en )
1925-04-06
Procedure for Playback of Talking Movies.
DK41485C
(en )
1930-01-20
Procedure for Reproduction of Embossed Films.
DK41517C
(en )
1930-01-27
Device for Writing Down Sound.
DK48670C
(en )
1934-04-23
Device by Systems Serving to Regulate the Speed of Movement of Sound Films Under Writing Down or Reproduction of Sounds.
DK47441C
(en )
1933-06-12
Procedure for Treating a Relief Sampling Film, Making It Suitable for Sound Reproduction.
DK43214C
(en )
1930-10-20
Optical Smoothing Device for Cinematography by Cinematographers.
DK36858C
(en )
1926-11-29
Sound reproducer for voice machines.
DK43785C
(en )
1931-03-02
Apparatus for recording sound on a light-sensitive film.
DK41813C
(en )
1930-03-10
Projection apparatus for Reproduction of embossed films.
DK33694C
(en )
1924-09-29
Electromagnetic apparatus for generating or recording sound oscillations, e.g. usable as Telephone or Microphone.
DK41581C
(en )
1930-02-03
Device for Sound Reproduction Systems Using Light Sensitive Cells.
DK32388C
(en )
1923-10-15
Device for photographic recording of sounds.
DK46673C
(en )
1932-12-27
Device for Reproduction of Photographic Images Carried by a Relief Patterned Carrier.
DK48286C
(en )
1934-01-22
Procedure for Amplitude Control by Recording Sounds Photographically.
DK36492C
(en )
1926-09-06
Procedure for Reducing Cross Speech by Addition Capacitors.
DK42610C
(en )
1930-07-14
Procedure and arrangement of sound recording systems on a photosensitive film.
DK35849C
(en )
1926-04-06
Procedure for Making Sound Records.
DK46707C
(en )
1933-01-02
Device for systems for reproducing recorded sounds.
DK46724C
(en )
1933-01-02
Device for Recording Films which, by Reproduction, produces spatially acting cinematographic images.
ES114604A1
(en )
1929-09-16
A regulating mechanism for sound reproduction devices.