AU104550B2
(en )
1938-07-02
Multi speed driving mechhanism for operating sound recording and / or reproducing apparatus
AU304737A
(en )
1938-07-02
Multi speed driving mechhanism for operating sound recording and / or reproducing apparatus
CA365669A
(en )
1937-04-27
Sound reproducing apparatus from record films
CA369898A
(en )
1937-11-09
Sound recording apparatus
CA380175A
(en )
1939-03-21
Sound recording or reproducing apparatus
CA368670A
(en )
1937-09-14
Sound reproducing apparatus
CA358441A
(en )
1936-06-09
Sound recording or reproducing apparatus
CA324284A
(en )
1932-07-19
Sound recording and reproducing apparatus
CA321026A
(en )
1932-03-29
Sound recording and reproducing apparatus
CA383880A
(en )
1939-09-05
Sound recording and reproducing apparatus
CA333909A
(en )
1933-07-11
Sound recording and reproducing apparatus
CA335815A
(en )
1933-09-19
Sound recording and reproducing apparatus
CA318917A
(en )
1932-01-12
Phonograph record manipulating apparatus
CA370636A
(en )
1937-12-21
Phonograph record duplicating method
CA338113A
(en )
1933-12-26
Phonograph disk playing apparatus
AU101846B2
(en )
1937-09-02
Method for photoelectric sound reproducing or recording and apparatus and phonograms therefor
CA369551A
(en )
1937-10-26
Disc for phonographic recording
CA344757A
(en )
1934-09-18
Sound recording and reproducing apparatus
CA368493A
(en )
1937-09-07
Sound recording system
CA368495A
(en )
1937-09-07
Sound recording system
CA369764A
(en )
1937-11-09
Sound recording system
CA370568A
(en )
1937-12-14
Sound recording system
CA368492A
(en )
1937-09-07
Sound recording system
CA375519A
(en )
1938-08-02
Sound recording and reproducing apparatus
CA375425A
(en )
1938-07-26
Sound recording and reproducing apparatus