AU104880B2
(en )
1938-09-01
Improvements in and relating to sound recording mechanism
AU354837A
(en )
1938-09-01
Improvements in and relating to sound recording mechanism
AU109431B2
(en )
Improvements in or relating to sound reproducing devices
AU107513B2
(en )
1939-06-08
Improvements in or relating to acoustic reproducer arrangements
AU215638A
(en )
1939-06-08
Improvements in or relating to acoustic reproducer arrangements
AU105771B2
(en )
1938-11-24
Improvements in or relating to sound film recording systems
AU107236B2
(en )
1939-05-04
Improvements in or relating to acoustic reproducers
CA377317A
(en )
1938-10-25
Sound reproducing and recording mechanism
AU107881B2
(en )
1939-07-13
Improvements in and relating to doorlocks
AU107220B2
(en )
1939-05-04
Improvements in and relating to aneurin
AU337537A
(en )
1938-11-24
Improvements in or relating to sound film recording systems
AU165138A
(en )
1939-05-04
Improvements in or relating to acoustic reproducers
AU105271B2
(en )
1938-10-06
Improvement insound recording and reproducing
AU106346B2
(en )
1939-01-19
Improvements in and relating to closets
AU108068B2
(en )
1939-08-03
Improvements in and relating to mechanical toys
AU104772B2
(en )
1938-08-25
Improvements in or relating to devices for recording or reproducing picture-or picture-and-sound films
AU275238A
(en )
1939-07-13
Improvements in and relating to doorlocks
AU305238A
(en )
1939-05-04
Improvements in and relating to aneurin
AU108767B2
(en )
1939-10-26
Improvements in or relating to microphones
AU106264B2
(en )
1939-01-12
Improvements in or relating to film-type phonographic apparatus
AU64838A
(en )
1938-10-06
Improvement insound recording and reproducing
AU110265B2
(en )
1940-04-11
Improvements in and relating to loudspeakers
AU105201B2
(en )
1938-09-29
Improvements in signal combining amplifiers
AU110135B2
(en )
1940-04-04
Improvements in and relating to mechanical hammers
AU109352B2
(en )
1939-12-21
Improvements in and relating to fishing reels