AU2926A
(en )
1926-01-11
Improvements in and relating to sound reproducing apparatus
AU340526A
(en )
1926-10-01
Improvements in or relating to sound reproducing apparatus
AU340626A
(en )
1926-10-01
Improvements in or relating to sound reproducing apparatus
AU302426A
(en )
1926-09-20
Improvements in and relating to sound reproducing apparatus
AU2077424A
(en )
1925-03-28
Improvements in and relating to sound reproducing apparatus
AU307926A
(en )
1926-09-20
Improvements in and relating to apparatus for transmitting or reproducing sound
AU535826A
(en )
1927-05-02
Improvements in and relating to apparatus for transmitting or reproducing sound
AU767727A
(en )
1927-11-02
Improvements in and relating to sound reproducing devices
AU204126A
(en )
1927-05-17
Improvements in and relating to amplifiers for talking machines and like sound reproducing apparatus
AU382526A
(en )
1927-05-17
Improvements in and relating to amplifiers for talking machines and like sound reproducing apparatus
AU485126A
(en )
1927-05-17
Improvements in or relating to recording apparatus
AU2124129A
(en )
1930-07-29
Improvements in or relating to electromagnetic sound recording and reproducing apparatus
AU1193728A
(en )
1928-12-04
Improvements in and relating to sound reproducing machines
AU1503528A
(en )
1929-07-02
Improvements in and relating to sound reproducing machines
AU1503628A
(en )
1929-05-07
Improvements in and relating to sound reproducing machines
AU1892129A
(en )
1930-02-18
Improvements in and relating to sound reproducing devices
AU1015827A
(en )
1928-05-22
Improvements in and relating to sound recording and reproducing
AU1568428A
(en )
1929-08-06
Improvements in or relating to apparatus for reproducing or recording sound waves
AU2571825A
(en )
1926-11-09
Improvements in and relating to talking machines
AU268026A
(en )
1926-12-31
Improvements in and relating to talking machines
CA263961A
(en )
1926-08-31
Sound reproducing apparatus
CA258793A
(en )
1926-03-09
Sound reproducing apparatus
CA263953A
(en )
1926-08-31
Sound reproducing apparatus
CA263960A
(en )
1926-08-31
Sound reproducing apparatus
AU2645325A
(en )
1926-01-04
Improvements in acoustic horns