DK55480C
(en )
1938-11-21
Apparatus for recording Gramophone records.
FR770577A
(en )
1934-09-17
Record for phonograph
DK54457C
(en )
1938-03-14
Recording disc for Gramophones.
DK51820C
(en )
1936-06-29
Apparatus for reproducing sound.
DK54194C
(en )
1938-01-17
Device for Recording Additive Color Films.
DK51614C
(en )
1936-05-11
Sound reproducing apparatus.
DK52257C
(en )
1936-10-05
Gramophone record.
DK50109C
(en )
1935-04-08
Guide bolt device for gramophone record plates.
FR789944A
(en )
1935-11-08
Automatic phonograph record distributor
DK55046C
(en )
1938-08-01
Device for photoelectric sound recording or reproducing apparatus.
DK73365C
(en )
1951-11-12
Apparatus for recording or reproducing images.
DK76764C
(en )
1953-11-30
Apparatus for recording or reproducing images.
DK52223C
(en )
1936-09-28
Electromagnetic recording apparatus, in particular for recording sound tracks.
DK55822C
(en )
1939-02-13
Procedure and Apparatus for Recording Sound.
DK58416C
(en )
1941-02-10
Device for Tone Recording Cameras.
DK53332C
(en )
1937-07-19
Magasing gramophone for automatic playback of several discs in succession.
FR796229A
(en )
1936-04-01
Device for recording phonographic records yourself
DK49958C
(en )
1935-03-04
Device for Adjusting the Needle for Recording and Playing Gramophone Records and Similar Records.
CA351210A
(en )
1935-06-25
Phonograph record manipulating apparatus
DK46511C
(en )
1932-11-21
Device for sound recording on gramophone records.
CA354275A
(en )
1935-11-19
Phonograph record retaining device
DK65484C
(en )
1947-08-04
Apparatus for Reproducing Images.
DK56391C
(en )
1939-07-03
Cassette for cinematographic recorders.
FI17799A
(en )
1937-11-12
Photovoltaic apparatus for recording and reproduction, including phonograms
DK54149C
(en )
1938-01-10
Method for Making a Multiple Audio Record.