GB525783A
(en )
1940-09-04
Improvements in or relating to filters
AU106628B2
(en )
1939-02-23
Improvements in or relating to electric filters
AU57938A
(en )
1939-02-23
Improvements in or relating to electric filters
AU106634B2
(en )
1939-03-02
Improvements in or relating to electrical filter arrangements
AU107640B2
(en )
1939-06-22
Improvements in or relating to filters
AU110802B2
(en )
Improvements in or relating to electric filters
AU107118B2
(en )
1939-04-20
Improvements in or relating to electrical bandpass filters
AU59438A
(en )
1939-03-02
Improvements in or relating to electrical filter arrangements
AU376238A
(en )
1939-06-22
Improvements in or relating to filters
GB531925A
(en )
1941-01-14
Improvements in or relating to filters
AU109837B2
(en )
1940-02-29
Improvements in or relating to electrical filters
AU110467B2
(en )
Improvements in or relating to electrical filters
AU111413B2
(en )
1940-09-12
Improvements in or relating to electrical filters
AU136338A
(en )
1939-04-20
Improvements in or relating to electrical bandpass filters
AU106316B2
(en )
1939-01-19
Improvements in or relating to electric condensers
AU108876B2
(en )
1939-11-02
Improvements in or relating to electric condensers
AU107514B2
(en )
1939-06-08
Improvements in or relating to electric condensers
AU108935B2
(en )
1938-04-24
Improvements in electric bandpass filters
AU105988B2
(en )
1938-12-08
Improvements in or relating to electric lamps
AU109618B2
(en )
1938-07-17
Improvements in or relating to electric apparatus
AU107589B2
(en )
1939-06-15
Improvements in or relating to electric transformers
AU106527B2
(en )
1939-02-09
Improvements in filters
AU69739A
(en )
1940-02-29
Improvements in or relating to electrical filters
AU402739A
(en )
1940-09-12
Improvements in or relating to electrical filters
AU105248B2
(en )
1938-10-06
Improvements in or relating to hydro-extractors