DK18510C
(en )
1914-03-02
Apparatus for recording, reproducing and recording sound.
DK18548C
(en )
1914-03-09
Apparatus for recording and recording sound.
DK19606C
(en )
1914-12-14
Apparatus for reproducing and transmitting sound.
DK23107C
(en )
1918-05-21
Apparatus for Phonographic Recording and Reproduction of Telephone Transmitted Messages.
DK17791C
(en )
1913-09-08
Procedure for recording and reproducing tones.
DK9120C
(en )
1906-12-17
Apparatus for recording, storing and reproducing sound by telegraphic means.
DK12892C
(en )
1910-01-24
Method and Apparatus for the production of gramophone records, phonograph rollers and similar sound reproducers.
DK16942C
(en )
1913-02-03
Apparatus for recording pieces of music on paper tapes and the like.
DK16867C
(en )
1913-01-20
Procedure for the production of sound-reproducing plates, tapes and the like, and methods and apparatus for reproducing sound by means of such sound-plates.
DK13480C
(en )
1910-08-01
Apparatus for reproducing or recording sounds.
DK20777C
(en )
1915-11-22
Apparatus for mounting the sound box by gramophones, phonographs and similar apparatus.
DK15810C
(en )
1912-04-01
Quick Telegraph and Photographic Apparatus for Reproducing the Sent Text.
DK14415C
(en )
1911-04-03
Procedure and Apparatus for Recording Musical Piano Performances.
DK20904C
(en )
1916-01-17
Method and Apparatus for Transmitting Sound Waves.
DK18385C
(en )
1914-01-19
Apparatus for apparatus for mechanical reproduction of music and the like.
DK25937C
(en )
1920-05-10
Device for gramophones and similar voice machines.
DK20513C
(en )
1915-08-30
Method and Apparatus for Leaving Leather Surfaces.
DK19300C
(en )
1914-09-28
Potato Recording Device.
DK30765C
(en )
1922-11-20
Device for recording and reproducing sound.
DK29747C
(en )
1922-06-12
Method and Apparatus for Sharpening Knife Discs.
DK19830C
(en )
1915-02-15
Audio box or similar for Gramophones, Phonographs and similar Devices.
DK42626C
(en )
1930-07-21
Apparatus for recording and reproducing sound.
DK23842C
(en )
1918-12-09
Method and Apparatus for the Manufacture of Peat Powder.
DK16484C
(en )
1912-10-07
Cinematograph for Stereoscopic Recording and Projection.
FR481600A
(en )
1916-12-19
Reproducing device and sound amplifier, for phonographs