GB607428A
(en )
1948-08-31
Improvements in and relating to receipt or like duplicating or recording devices
AU132695B2
(en )
1946-01-10
Improvements in or relating to magnetic recording and reproducing apparatus
AU13346A
(en )
1946-01-10
Improvements in or relating to magnetic recording and reproducing apparatus
CA437755A
(en )
1946-11-05
Magnetic recording method and means
AU141750B2
(en )
1947-09-18
Improvements in magnetic recording and reproducing apparatus
AU142195B2
(en )
1947-09-11
Improvements in magnetic recording and reproducing apparatus
AU134032B2
(en )
1946-10-31
Improvements in or relating to sound recording and reproduction
AU130741B2
(en )
1946-06-05
Improvements in or relating to electrical sound reproducing and/or recording devices
AU139887B2
(en )
1948-11-11
Improvements in and relating to sound recording and reproducing apparatus
AU1453647A
(en )
1947-09-18
Improvements in magnetic recording and reproducing apparatus
AU1446247A
(en )
1947-09-11
Improvements in magnetic recording and reproducing apparatus
AU142902B2
(en )
1947-09-18
Improvements in magnetic recording reproducing apparatus
AU684846A
(en )
1946-10-31
Improvements in or relating to sound recording and reproduction
AU337546A
(en )
1946-06-05
Improvements in or relating to electrical sound reproducing and/or recording devices
AU142265B2
(en )
1947-12-04
Improvements in or relating to magnetic recording
AU1630847A
(en )
1948-11-11
Improvements in and relating to sound recording and reproducing apparatus
AU1453547A
(en )
1947-09-18
Improvements in magnetic recording reproducing apparatus
AU138024B2
(en )
1946-10-24
Improvements in recording and controlling apparatus
AU141915B2
(en )
1948-05-20
Improvements in magnetic recording and reproducing
AU144610B2
(en )
1948-05-20
Improvements in magnetic recording and reproducing
AU144611B2
(en )
1948-05-20
Improvements in magnetic reproducing
AU1622947A
(en )
1947-12-04
Improvements in or relating to magnetic recording
AU138702B2
(en )
1947-06-12
Improvements in or relating to sound recording and reproducing devices
AU149254B2
(en )
1950-11-02
Improvements in or relating to magnetic sound recording or reproducing apparatus
AU125661B2
(en )
1947-10-16
Improvements in or relating to magnetic recording devices and magnetizing heads therefor