DK46293C
(en )
1932-10-10
Procedure for the Production of Cinematographic Films.
DK50745C
(en )
1935-10-07
Method for mechanical recording of sound oscillations to be reproduced by optical means.
DK48286C
(en )
1934-01-22
Procedure for Amplitude Control by Recording Sounds Photographically.
DK30713C
(en )
1922-11-20
Gas Production Apparatus.
DK52190C
(en )
1936-09-21
Band-shaped carrier for recording an oscillation record, which must be reproduced by optical means.
DK51701C
(en )
1936-06-02
Procedure for the production of sound plates suitable for recording, reproduction and matriculation.
DK43435C
(en )
1930-12-01
Machine for the amplification of acoustic oscillations recorded by magnetic means.
DK47822C
(en )
1933-10-02
Apparatus for the production of foam by mechanical means.
DK46385C
(en )
1932-10-31
Performance Film for Reproduction of Sound and Procedure for Recording Sound according to the Intensity Method.
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.
DK46821C
(en )
1933-01-23
Procedure for the Contrast Generation of Regenerated Cellulose by Photochemical Method.
FR725264A
(en )
1932-05-10
Further training for reproducers for phonographic amplifiers
DK47665C
(en )
1933-08-21
Method of Making Sound Plates with Metallic Core.
DK43219C
(en )
1930-10-20
Method of Cooling Using Solid Carbon dioxide.
DK49763C
(en )
1935-01-14
Procedure for Mechanical Recording of Oscillations, in particular Sound Oscillations, and Carriers Applicable to this Procedure.
DK52617C
(en )
1937-01-25
Apparatus for the production of air foam by mechanical means.
DK32005C
(en )
1923-07-23
Apparatus for reproducing or recording sound.
ES118791A1
(en )
1930-08-01
A procedure of using sound frames for the reproduction of sounds.
DK46330C
(en )
1932-10-17
Device for Regulating the Sound Color of Sounds Reproduced Electrically.
DK47340C
(en )
1933-05-15
Procedure for the Production of Amorphous Carbon.
DK45394C
(en )
1932-03-14
Procedure for the production of gramophone records.
DK50169C
(en )
1935-04-23
Recording means, such as an audio recording means, e.g. a gramophone record, or the subject of such.
DK58436C
(en )
1941-02-17
Apparatus for the production of sound records.
DK44852C
(en )
1931-11-16
Method for Cinematographic Recording of Scenes, Part of which is formed by Image Projection.
DK59390C
(en )
1942-01-12
Apparatus for continuous Manufacture of clad, cast strings.