DK50698C
(en )
1935-09-30
Electrodynamic sound reproducing apparatus.
FR749472A
(en )
1933-07-24
Loud speaker
DK49331C
(en )
1934-10-01
Apparatus for reproducing speech, music, song and other sounds.
DK60920C
(en )
1943-05-17
Procedure and Injection Form for the Manufacture of Plastic Tubes.
DK49970C
(en )
1935-03-04
Apparatus for showing sound films with musical accompaniment.
FR751482A
(en )
1933-09-04
Loud speaker
FR705714A
(en )
1931-06-11
Acoustic device to allow speakers, actors, singers, violinists and other musicians, etc. to control themselves
DK46384C
(en )
1932-10-31
Apparatus for the production of cinematographic films and the like, in particular sound films.
DK51614C
(en )
1936-05-11
Sound reproducing apparatus.
DK51820C
(en )
1936-06-29
Apparatus for reproducing sound.
DK48168C
(en )
1933-12-18
Audio Film and Procedure for Making the Same.
DK47441C
(en )
1933-06-12
Procedure for Treating a Relief Sampling Film, Making It Suitable for Sound Reproduction.
DK46778C
(en )
1933-01-16
Wrapping device for the manufacture of cigars, cigarillos and the like.
DK46775C
(en )
1933-01-16
Device for sound reproducing apparatus.
DK48150C
(en )
1933-12-11
Procedure and Device for Treating Cigar Wraps.
CH175397A
(en )
1935-02-28
Sound pickup device.
DK45612C
(en )
1932-05-02
Procedure and Device for Peeling Tobacco Leaves.
FR751401A
(en )
1933-09-04
Advanced sound amplifier
DK44635C
(en )
1931-09-28
Sound reproducing apparatus.
DK52223C
(en )
1936-09-28
Electromagnetic recording apparatus, in particular for recording sound tracks.
DK48889C
(en )
1934-06-18
Method and Apparatus for Manufacturing Adhesives.
DK48567C
(en )
1934-03-26
Apparatus for producing sound.
DK49793C
(en )
1935-01-21
Tape microphone.
DK52126C
(en )
1936-09-07
Procedure and Apparatus for Sound Reproduction Using Multiple Sounders.
DK53828C
(en )
1937-11-08
Method and Apparatus for Making Silent Tone Films.