AU100124B2
(en )
1937-01-23
Improvements in method and apparatus for reproducing sound
AU136936A
(en )
1937-01-23
Improvements in method and apparatus for reproducing sound
AU103414B2
(en )
1938-03-17
Improvements in apparatus and methods of recording and reproducing sound
AU105763B2
(en )
1938-11-24
Improvements in or relating to sound recording and reproducing apparatus
AU88337A
(en )
1938-03-17
Improvements in apparatus and methods of recording and reproducing sound
AU549437A
(en )
1938-11-24
Improvements in or relating to sound recording and reproducing apparatus
AU103816B2
(en )
1938-05-12
Improvements in and relating to cabinets for sound and picture reproducing apparatus
AU105470B2
(en )
1938-10-27
Improvement in apparatus forand method of recording sound on film
CA368670A
(en )
1937-09-14
Sound reproducing apparatus
AU104521B2
(en )
1936-12-03
Improvements in sound reproducing apparatus
AU119837A
(en )
1938-05-12
Improvements in and relating to cabinets for sound and picture reproducing apparatus
AU440537A
(en )
1938-10-27
Improvement in apparatus forand method of recording sound on film
AU2561535A
(en )
1936-12-17
Improvements in methods and apparatus for conducting sound
AU504336A
(en )
1936-12-03
Improvements in sound reproducing apparatus
CA370343A
(en )
1937-12-07
Sound re-recording method
CA366629A
(en )
1937-06-08
Combined picture and sound recording apparatus
CA369898A
(en )
1937-11-09
Sound recording apparatus
AU101846B2
(en )
1937-09-02
Method for photoelectric sound reproducing or recording and apparatus and phonograms therefor
CA367526A
(en )
1937-07-20
Tie making apparatus and method
CA333909A
(en )
1933-07-11
Sound recording and reproducing apparatus
CA335815A
(en )
1933-09-19
Sound recording and reproducing apparatus
CA351213A
(en )
1935-06-25
Sound recording and reproducing apparatus
CA364965A
(en )
1937-03-23
Fractionating method and apparatus
CA321026A
(en )
1932-03-29
Sound recording and reproducing apparatus
CA324284A
(en )
1932-07-19
Sound recording and reproducing apparatus