DK50698C
(en )
1935-09-30
Electrodynamic sound reproducing apparatus.
DK59306C
(en )
1941-12-15
Procedure for the manufacture of molds and apparatus for its implementation.
DK55822C
(en )
1939-02-13
Procedure and Apparatus for Recording Sound.
DK42626C
(en )
1930-07-21
Apparatus for recording and reproducing sound.
DK51820C
(en )
1936-06-29
Apparatus for reproducing sound.
DK53798C
(en )
1937-11-01
Procedure and Apparatus for Constant Resistance in Electromagnetic Sound Recording Devices.
DK55963C
(en )
1939-03-20
Method and Apparatus for the Manufacture of Cellulose Cellulose.
DK52126C
(en )
1936-09-07
Procedure and Apparatus for Sound Reproduction Using Multiple Sounders.
DK46426C
(en )
1932-11-07
Device for Receiving and Reproducing Sound.
DK51614C
(en )
1936-05-11
Sound reproducing apparatus.
DK55875C
(en )
1939-02-27
Procedure and Apparatus for Graveling of Roads.
DK67911C
(en )
1948-11-08
Method and apparatus for stereophonic sound recording or sound transmission and sound reproduction.
DK66382C
(en )
1948-03-01
Method and Apparatus for Erasing Magnetic Sound Records.
DK54507C
(en )
1938-03-21
Apparatus for Receiving and Determining Direction of Sound Waves.
DK59236C
(en )
1941-11-24
Audio film with associated methods and apparatus for making the same.
DK40791C
(en )
1929-09-16
Apparatus for Recording and Reproducing Telephone Calls.
DK54148C
(en )
1938-01-10
Procedure and arrangement of apparatus for recording and reproducing sound.
DK62181C
(en )
1944-04-24
Briquette Procedure and Apparatus.
DK52145C
(en )
1936-09-14
Procedure and Apparatus for Recording Oscillations.
DK55480C
(en )
1938-11-21
Apparatus for recording Gramophone records.
DK62510C
(en )
1944-07-31
Apparatus for receiving and recording telegraph signals.
DK56158C
(en )
1939-05-08
Clay Procedure and Apparatus.
DK63803C
(en )
1945-08-13
Method and Apparatus for Impulse Giving.
DK68860C
(en )
1949-04-04
Procedure and apparatus for electro-optical tone recording in Braille.
DK69312C
(en )
1949-06-07
Procedure and apparatus for electro-optical tone recording in Braille.