DK50698C
(en )
1935-09-30
Electrodynamic sound reproducing apparatus.
DK51691C
(en )
1936-05-25
Apparatus for continuous recording or reproduction of photographic records on an endless film strip.
DK56231C
(en )
1939-05-30
Procedure for Reproducing a Sound Record on Film and Apparatus for Exercising the Procedure.
DK55822C
(en )
1939-02-13
Procedure and Apparatus for Recording Sound.
DK54586C
(en )
1938-04-11
Method and apparatus for recording sound on photographic material.
DK57214C
(en )
1940-01-29
Procedure for Making and Reproducing a Photographic Sound Record.
DK55480C
(en )
1938-11-21
Apparatus for recording Gramophone records.
DK55045C
(en )
1938-08-01
Sound films and Procedures and Apparatus both for photographic recording of sound and for reproduction of the same.
DK51820C
(en )
1936-06-29
Apparatus for reproducing sound.
DK52126C
(en )
1936-09-07
Procedure and Apparatus for Sound Reproduction Using Multiple Sounders.
DK51614C
(en )
1936-05-11
Sound reproducing apparatus.
ES121100A1
(en )
1931-01-16
A procedure for recording and reproducing sounds.
DK62141C
(en )
1944-04-11
Procedure and Apparatus for Joining Film Pieces.
DK50468C
(en )
1935-07-22
Device for Retaining Phonogram Sheets on the Cylindrical Phonogram Holder in an Optical Apparatus for Sound Reproduction.
DK46511C
(en )
1932-11-21
Device for sound recording on gramophone records.
DK53798C
(en )
1937-11-01
Procedure and Apparatus for Constant Resistance in Electromagnetic Sound Recording Devices.
DK65696C
(en )
1947-09-29
Apparatus for rewinding an endless film tape.
DK61860C
(en )
1944-01-31
Apparatus for sound recording and reproduction by means of sound carriers mounted on coil sets.
DK58472C
(en )
1941-03-03
Tone film with thank-you note and apparatus for making such a film.
DK46426C
(en )
1932-11-07
Device for Receiving and Reproducing Sound.
DK67911C
(en )
1948-11-08
Method and apparatus for stereophonic sound recording or sound transmission and sound reproduction.
DK57818C
(en )
1940-07-22
Method and Apparatus for Volume Expansion during Audio Film Reproduction.
DK52145C
(en )
1936-09-14
Procedure and Apparatus for Recording Oscillations.
DK47638C
(en )
1933-08-14
Device for sound recording and sound reproduction.
FR710349A
(en )
1931-08-21
Further training for reproducers of music recorded on cinematographic film