AU113256B2
(en )
1941-06-19
Improvements in or relating to bandpass filters
AU113669B2
(en )
1941-08-02
Improvements in or relating to bandpass filters
AU114469B2
(en )
1942-01-10
Improvements in or relating to bandpass filters
AU227440A
(en )
1941-06-19
Improvements in or relating to bandpass filters
AU304040A
(en )
1941-08-02
Improvements in or relating to bandpass filters
AU442740A
(en )
1942-01-10
Improvements in or relating to bandpass filters
AU112083B2
(en )
1940-12-19
Improvements in or relating to filters
AU71940A
(en )
1940-12-19
Improvements in or relating to filters
AU113502B2
(en )
1941-07-24
Improvements in piezoelectric bandpass filters
AU109892B2
(en )
1940-03-07
Improvements relating to filters
AU111555B2
(en )
1940-09-26
Improvements relating to filters
AU112991B2
(en )
1941-05-08
Improvements relating to filters
AU114875B2
(en )
1942-03-26
Improvements in or relating to filters
AU115069B2
(en )
1942-05-04
Improvements in or relating to filters
AU266040A
(en )
1941-07-24
Improvements in piezoelectric bandpass filters
AU357539A
(en )
1940-03-07
Improvements relating to filters
AU293940A
(en )
1941-05-08
Improvements relating to filters
AU36440A
(en )
1940-09-26
Improvements relating to filters
AU112343B2
(en )
Improvements in filters
AU112503B2
(en )
1941-02-20
Improvements in filters
AU292241A
(en )
1942-03-26
Improvements in or relating to filters
AU292141A
(en )
1942-05-04
Improvements in or relating to filters
GB538832A
(en )
1941-08-19
Improvements in filters
AU107640B2
(en )
1939-06-22
Improvements in or relating to filters
AU107118B2
(en )
1939-04-20
Improvements in or relating to electrical bandpass filters