FR690257A
(en )
1930-09-18
Recorder for phonograph records
DK46511C
(en )
1932-11-21
Device for sound recording on gramophone records.
FR620996A
(en )
1927-05-03
Recorder for phonograph records
DK46707C
(en )
1933-01-02
Device for systems for reproducing recorded sounds.
FR705593A
(en )
1931-06-10
Phonograph record
FR725084A
(en )
1932-05-07
Phonograph record
FR39582E
(en )
1931-11-30
Recorder for phonograph records
FR699191A
(en )
1931-02-11
Recorder for phonographic records
ES122423A1
(en )
1931-07-01
Amplifier device for phonographs.
FR711311A
(en )
1931-09-07
Recorder for phonograph records
DK47638C
(en )
1933-08-14
Device for sound recording and sound reproduction.
AT112399B
(en )
1929-02-25
Sound recording and reproducing apparatus.
DK50169C
(en )
1935-04-23
Recording means, such as an audio recording means, e.g. a gramophone record, or the subject of such.
DK55480C
(en )
1938-11-21
Apparatus for recording Gramophone records.
FR625791A
(en )
1927-08-19
Gramophone record cabinet
DK54457C
(en )
1938-03-14
Recording disc for Gramophones.
ES121100A1
(en )
1931-01-16
A procedure for recording and reproducing sounds.
ES129591A1
(en )
1933-04-01
An improved device for recording sounds in phonograph records.
ES122073A3
(en )
1931-06-16
Case-briefcase for gramophone records.
DK50109C
(en )
1935-04-08
Guide bolt device for gramophone record plates.
DK55046C
(en )
1938-08-01
Device for photoelectric sound recording or reproducing apparatus.
FR707864A
(en )
1931-07-16
Phonographic record
DK42874C
(en )
1930-09-01
Gramophone record.
CA284620A
(en )
1928-11-06
Phonograph records recording machine
ES124109A1
(en )
1932-01-01
Improvements in the methods and devices for recording sounds and sound records.