AU115625B2
(en )
1942-08-13
Improvements in or relating to devices for the stereophonic transmission of sound
AU352741A
(en )
1942-08-13
Improvements in or relating to devices for the stereophonic transmission of sound
AU114765B2
(en )
Improvements in or relating to high frequency transmission systems
AU112755B2
(en )
1941-04-03
Improvements in or relating to electro-acoustic devices
AU114766B2
(en )
Improvements in systems forthe electric transmission of sound andother waves
AU112568B2
(en )
1941-02-27
Improvements relating to devices for the emission or transmission of sound
AU114568B2
(en )
1942-02-05
Improvements relating to devices for the transmission and reception of grouped electro-magnetic waves
AU115140A
(en )
1941-04-03
Improvements in or relating to electro-acoustic devices
AU112516B2
(en )
1941-02-20
Improvements in or relating to butt-jointing devices
AU64040A
(en )
1941-02-27
Improvements relating to devices for the emission or transmission of sound
CA394407A
(en )
1941-02-04
Microphone
CA396071A
(en )
1941-04-22
Acoustic device
CA396698A
(en )
1941-05-20
Acoustic device
CA396700A
(en )
1941-05-20
Acoustic device
CA395059A
(en )
1941-03-11
Transmission means
AU110189B2
(en )
1940-04-04
Improvements in and relating to electroacoustic transmitters andthe like
CA401754A
(en )
1941-12-30
Antiseptic
AU114604B2
(en )
Improvements in microphones
AU116212B2
(en )
1942-12-10
Methods and devices for creating novel sound effects
AU115563B2
(en )
1942-07-30
Improvements in or relating tothe manufacture of pompoms andthe like
AU116054B2
(en )
1942-11-19
Improvements in or relating to transmission belts
AU115415B2
(en )
1942-07-09
Improvements in or relating to facsimile transmitters
AU17641A
(en )
1942-02-05
Improvements relating to devices for the transmission and reception of grouped electro-magnetic waves
AU115207B2
(en )
1942-06-04
Improvements in or relating to ashtrays
CA397642A
(en )
1941-07-01
Flexible fibreboard manufacture