DK30372C
(en )
1922-10-02
Tone arm for voice machines and the like.
DK23965C
(en )
1919-01-06
Sound recorder and emitter for voice machines and the like.
DK27616C
(en )
1921-05-17
Sound suit for voice machines and the like.
DK30297C
(en )
1922-09-18
Automatic Stopwatch for Gramophones and similar voice machines.
AT90331B
(en )
1922-12-11
Telephonic sound box for dictation phonographs, telephonographs and similar apparatus.
DK30417C
(en )
1922-10-09
Pin holder for speech machines and the like.
ES69801A1
(en )
1919-06-16
Improvements in gramophones or other similar talking machines.
DK30606C
(en )
1922-11-06
Muffler for Gramophones and the like.
DK30012C
(en )
1922-07-31
Brake for Speech Machines and the like.
DK24551C
(en )
1919-05-19
Audio amplifier for Telephones and the like.
DK30715C
(en )
1922-11-20
Telephone Sound Box for Dictaphones, Telephographers and similar Devices.
DK25012C
(en )
1919-09-15
Microphone.
DK30631C
(en )
1922-11-13
Microphone.
ES71614A1
(en )
1920-02-16
Microphone.
DK29167C
(en )
1922-01-16
Listening microphone.
DK26481C
(en )
1920-08-23
Turntable.
DK32105C
(en )
1923-08-13
Electric Drive for Gramophones, Phonographs and the like.
DK32596C
(en )
1923-12-10
Device for sound reproducing apparatus.
ES71769A1
(en )
1920-03-01
Improvements in telephone lines.
DK32731C
(en )
1924-01-21
Ringtone for Bells.
FR566024A
(en )
1924-02-08
Sound reproducer for phonographs
DK36858C
(en )
1926-11-29
Sound reproducer for voice machines.
CH90735A
(en )
1921-09-16
Sound arm joint for speaking machines.
DK31157C
(en )
1923-01-22
Stop device for gramophones and the like.
DK33377C
(en )
1924-06-23
Mechanism for Gramophones and the like.