AU1839734A
(en )
1935-08-22
Improvements in or relating to diaphragms for use in acoustic devices
AU1721534A
(en )
1935-05-02
Improvements in or relating to microphones
AU1839634A
(en )
1935-07-25
Improvements in or relating to loudspeakers
AU2063634A
(en )
1936-01-09
Improvements in or relating to loudspeakers
CA345732A
(en )
1934-10-30
Acoustic device
CA345731A
(en )
1934-10-30
Acoustic device
CA342826A
(en )
1934-07-03
Acoustic device
CA346051A
(en )
1934-11-13
Acoustic device
AU1769534A
(en )
1935-07-11
Improvements in or relating to electroacoustic translating devices
AU1601334A
(en )
1935-03-14
Improvements in or relating to electric-acoustic devices
AU1902934A
(en )
1935-09-05
Improvements in or relating to sound film apparatus
AU107085B2
(en )
1939-04-20
Improvements in or relating to acoustic diaphragms
AU2574935A
(en )
1937-01-14
Improvements in or relating to acoustic devices
AU2042534A
(en )
1935-09-26
Improvements in or relating to sphygmomanometers
AU2086935A
(en )
1936-01-23
Improvements in or relating to acoustic apparatus
AU2019134A
(en )
1935-11-02
Improvements in or relating to acoustic reproducing apparatus
AU1595834A
(en )
1934-08-02
Improvements in or relating to the hydration of loefines
CA339037A
(en )
1934-01-30
Membrane unit building
AU2565735A
(en )
1936-08-13
Improvements in or relating to microphones
AU130738A
(en )
1939-04-20
Improvements in or relating to acoustic diaphragms
AU102651B2
(en )
Improvements in or relating to loudspeakers
AU2026134A
(en )
1935-12-05
Improvements in or relating to telephone systems
AU1678334A
(en )
1935-03-21
Improvements in or relating to telephone systems
CA362790A
(en )
1936-12-22
Acoustic diaphragm
CA342591A
(en )
1934-06-26
Acoustical plaster