DK50698C
(en )
1935-09-30
Electrodynamic sound reproducing apparatus.
DK52223C
(en )
1936-09-28
Electromagnetic recording apparatus, in particular for recording sound tracks.
DK51736C
(en )
1936-06-08
Magnetic system, in particular for electroacoustic apparatus.
DK51614C
(en )
1936-05-11
Sound reproducing apparatus.
DK51820C
(en )
1936-06-29
Apparatus for reproducing sound.
DK55046C
(en )
1938-08-01
Device for photoelectric sound recording or reproducing apparatus.
DK55480C
(en )
1938-11-21
Apparatus for recording Gramophone records.
DK48567C
(en )
1934-03-26
Apparatus for producing sound.
DK52622C
(en )
1937-01-25
Apparatus for generating sound signals for vehicles, in particular motor vehicles.
DK54149C
(en )
1938-01-10
Method for Making a Multiple Audio Record.
DK52257C
(en )
1936-10-05
Gramophone record.
DK51643C
(en )
1936-05-18
Closure, especially for Use in Pig Tracks.
DK50109C
(en )
1935-04-08
Guide bolt device for gramophone record plates.
DK51855C
(en )
1936-07-06
Acoustic Apparatus.
DK54244C
(en )
1938-01-31
Acoustic Apparatus.
CH175223A
(en )
1935-02-15
Railway carriage pusher.
ES1941Y
(en )
1934-03-01
Metal disc for talking machines.
ES122073A3
(en )
1931-06-16
Case-briefcase for gramophone records.
DK53927C
(en )
1937-11-29
Procedure for Reproducing Telephone Messages.
ES122423A1
(en )
1931-07-01
Amplifier device for phonographs.
DK48770C
(en )
1934-05-22
Sound reproduction system.
DK64569C
(en )
1946-06-24
Procedure for the manufacture of steel, in particular quality steel.
DK52082C
(en )
1936-08-31
Drives for Toys.
DK59962C
(en )
1942-07-13
Apparatus for Freezing Foodstuffs.
DK52367C
(en )
1936-11-30
Method for Manufacturing Magnetic Cores.