CH207143A
(en )
1939-09-30
Radio receiver.
DK60596C
(en )
1943-02-15
Selects to selectively Engage any of several Tuning Impedances in a Radio Receiver's Voting Circuit.
FR863263A
(en )
1941-03-28
Superheterodyne radio receivers
DK61659C
(en )
1943-12-06
Switch to Radio Receivers with Push Button Tuning.
CH208103A
(en )
1939-12-31
Radio receiver with fully automatic tuning.
CA390744A
(en )
1940-08-13
Radio tuning indication circuit
CA391545A
(en )
1940-09-24
Superheterodyne receiving circuit
CA386615A
(en )
1940-01-30
Radio tuning circuit
DK57832C
(en )
1940-07-29
Radio receiver with noise-free Tuning.
DK57013C
(en )
1939-12-11
Radio receiver with Push Button setting.
DK55368C
(en )
1938-10-24
Radio receiver in whose input circuit the pipe noise constitutes a significant part of the circuit's noise voltage.
DK59483C
(en )
1942-02-16
Radio receiver with automatic Tuning.
DK57432C
(en )
1940-04-01
Radio receiver with automatic Tuning.
CA389914A
(en )
1940-07-09
Superheterodyne radio receiver
CA392363A
(en )
1940-11-05
Superheterodyne radio receiver
DK59975C
(en )
1942-07-20
Radio receiver with Page Tuning.
DK61117C
(en )
1943-07-12
Push Button Selector for Radio Receivers.
CH207285A
(en )
1939-10-15
Radio receiver.
CA384722A
(en )
1939-10-17
Superheterodyne receiver circuit
CH227892A
(en )
1943-07-15
Switch built into concentric high frequency lines.
DK67056C
(en )
1948-06-21
Radio receiver with folding Tuning scale.
AU114280B2
(en )
1941-12-04
Improvements in radio tuning systems
CA381004A
(en )
1939-04-25
Radio receiver tuning circuit
CA391051A
(en )
1940-09-03
Radio line-connection board
CA391961A
(en )
1940-10-15
Radio receiving circuit