CA580373A
(en )
1959-07-28
System and apparatus for recording the listening habits of wave signal receiver users
CA525109A
(en )
1956-05-15
System and apparatus for determining the listening habits of wave signal receiver users
CA570978A
(en )
1959-02-17
System and apparatus for determining the listening or viewing habits of wave signal receiver users
CA575448A
(en )
1959-05-05
System for determining listening habits of wave signal receiver users
CA589329A
(en )
1959-12-22
System for determining listening habits of wave signal receiver users
CA634229A
(en )
1962-01-09
Method and apparatus for automatically determining the listening habits of wave signal receiver users
CA600153A
(en )
1960-06-21
System and apparatus for determining the listening or viewing habits of wave signal receiver users
CA586580A
(en )
1959-11-10
Device for stereophonically recording and transmitting sound waves
CA533638A
(en )
1956-11-27
System of determining the listening habits of wave signal receiver users
CA587958A
(en )
1959-12-01
Apparatus for recording and reproducing telegraph signals
AU223585B2
(en )
1957-05-30
Apparatus for use in determining the listening or viewing habits of wave signal receiver users
AU2361056A
(en )
1957-05-30
Apparatus for use in determining the listening or viewing habits of wave signal receiver users
CA585047A
(en )
1959-10-13
Monitoring system for wave signal receivers
CA576561A
(en )
1959-05-26
Television signal wave measuring apparatus
AU221128B2
(en )
1957-08-08
Improvements in or relating to apparatus for determining the listening or viewing habits of wave signal receiver users
CA587058A
(en )
1959-11-17
Sound recording and sound reproducing apparatus
CA536685A
(en )
1957-02-05
Method of and apparatus for the transmission and reception of sound waves
CA636566A
(en )
1962-02-13
Low frequency signal amplifier
CA569945A
(en )
1959-02-03
Heat-controlled acoustic wave system
CA573934A
(en )
1959-04-14
Frequency selective circuit arrangements for use with video and like signals
AU2507357A
(en )
1957-08-08
Improvements in or relating to apparatus for determining the listening or viewing habits of wave signal receiver users
CA583984A
(en )
1959-09-29
Twinplex telegraph signal receiver
CA587995A
(en )
1959-12-01
Audio frequency repeater system
CA573933A
(en )
1959-04-14
Reduction of unwanted signals in electro-biological apparatus
AU231117B2
(en )
1959-11-05
Television receiver witha common amplifier with picture and sound signals