AU2276629A
(en )
1930-10-14
Improvements in or relating to electrical recording devices
AU1367528A
(en )
1929-06-11
Improvements in or relating to light-sensitive electric devices
AU2136329A
(en )
1929-12-17
Improvements in or relating to electrical connectors
AU2031729A
(en )
1929-10-29
Improvements in or relating to sound recording devices
AU2326129A
(en )
1929-11-15
Improvements in or relating to electric pickup devices for gramophones
AU2439729A
(en )
1931-04-02
Improvements isa or relating to electric recorders
AU2309529A
(en )
1930-03-25
Improvements in electrical condensers
AU2245829A
(en )
1930-03-25
Improvements in coin-testing devices
AU2140829A
(en )
1929-12-24
Improvements in or relating to electric devices adapted to measure potential differences
AU1352828A
(en )
1929-05-14
Improvements in or relating to electric switchgear
CA295530A
(en )
1929-12-10
Electrical device
CA291391A
(en )
1929-07-16
Electrical device
AU2222229A
(en )
1930-05-20
Improvements in or relating to totalizators
AU1570328A
(en )
1929-10-01
Improvements in or relating to sound-projectors
AU2243629A
(en )
1930-03-18
Improvements in or relating to drill-steels
AU1950229A
(en )
1929-10-01
Improvements in or relating to microphons
CA288182A
(en )
1929-03-26
Electrical connection
AU2382029A
(en )
1930-10-14
Improvements in insulators
AU2337229A
(en )
1930-09-02
Improvements in latch-locks
AU1315528A
(en )
1929-05-14
Improvements in swingle-trees
AU1859229A
(en )
1930-01-28
Improvements in carburetters
AU2274229A
(en )
1930-10-14
Improvements in bootheels
CA292325A
(en )
1929-08-20
Electric governor
AU2404329A
(en )
1930-12-23
Improvements in or relating to electric locomotives
CA293036A
(en )
1929-09-10
Electrical reproducer