GB330946A
(en )
1930-06-26
Improvements in or relating to electric circuit-breakers
AU2012129A
(en )
1929-10-08
Improvements in or relating to electric discharge devices
AU2061129A
(en )
1929-11-06
Improvements in or relating to electric discharge devices
AU991327A
(en )
1928-02-21
Improvements in or relating to electric discharge devices
AU1394928A
(en )
1929-09-03
Improvements in or relating to electrical discharge devices
AU2032529A
(en )
1929-11-06
Improvements in or relating to electric discharge tubes
AU1799829A
(en )
1929-12-10
Improvements in or relating to electric discharge tubes
AU2032429A
(en )
1929-10-08
Improvements in or relating to electric discharge tubes
AU3007130A
(en )
1931-12-17
Improvements in or relating to electric discharge devices
AU2085729A
(en )
1929-11-06
Improvements in or relating to electric lamps
AU1352828A
(en )
1929-05-14
Improvements in or relating to electric switchgear
AU1577728A
(en )
1929-10-01
Improvements in or relating to electric devices
AU1367528A
(en )
1929-06-11
Improvements in or relating to light-sensitive electric devices
AU2250929A
(en )
1930-04-29
Improvement in electrical discharge device
CA294380A
(en )
1929-10-29
Electric discharge device
CA296219A
(en )
1929-12-31
Electric discharge device
AU2159829A
(en )
1930-08-19
Improvements in or relating to electric circuit controlling devices
AU2159729A
(en )
1930-02-11
Improvements in or relating to electric circuit controlling devices
CA295117A
(en )
1929-11-26
Electric cell
CA295116A
(en )
1929-11-26
Electric cell
AU3007130B
(en )
1931-12-17
Improvements in or relating to electric discharge devices
AU1810129A
(en )
1930-02-11
Improvements in electric switches
AU1871529A
(en )
1930-03-18
Improvements in electric switches
AU1748228A
(en )
1929-09-03
Improvements in electric discharge devices
AU2382029A
(en )
1930-10-14
Improvements in insulators