CH207423A
(en )
1939-10-31
Switching arrangement for eliminating interference in superheterodyne receivers.
DK62860C
(en )
1944-11-06
Device at High Frequency Circuits, especially in Radio Receivers, for Indicating True Tuning.
FR848058A
(en )
1939-10-23
Fully automatic tuning radio receiver
DK58427C
(en )
1941-02-17
Automatic Tuning device for Superheterodyne type radio receivers.
DK57741C
(en )
1940-07-01
Device for Coupled Circuits in Radio Receivers.
DK56624C
(en )
1939-09-04
Device for Radio Receivers for Indicating the Right Tune.
DK59273C
(en )
1941-12-08
Tuning device for Radio Receivers.
DK60742C
(en )
1943-03-29
Tuning device for Radio Receivers.
DK57359C
(en )
1940-03-11
Device with High Frequency Amplifiers, in particular Radio Receivers, for automatic Adjustment of the Selectivity.
DK50580C
(en )
1935-08-26
Tuning device for High Frequency Current Devices, in particular Radio Devices.
DK56803C
(en )
1939-10-16
Device for Tuning Circuits in Radio Receivers and Other High Frequency Amplifiers.
DK60093C
(en )
1942-08-31
Overlay Radio Receiver for Receiving Multiple Frequency Bands.
CH202675A
(en )
1939-01-31
Intermediate frequency heterodyne receiving circuit with automatic tuning correction.
GB508579A
(en )
1939-07-03
Improvements in antenna circuits for radio receivers
DK48578C
(en )
1934-04-03
Input oscillation circuit device for Radio receivers.
CH201776A
(en )
1938-12-15
Arrangement for high frequency systems, in particular wire radio systems.
DK56568C
(en )
1939-08-21
Device for Superheterodyne Receivers.
DK57490C
(en )
1940-04-15
Device for Tuning Elements for Radio Receivers and Other High Frequency Amplifiers.
DK53822C
(en )
1937-11-08
Automatic Tuning Device for Radio Receivers.
DK37535C
(en )
1927-05-30
Device for tuning the antenna circuit in receivers for electrical oscillations.
DK55579C
(en )
1938-12-19
Coil revolvers for High Frequency Devices, especially for Radio Receivers.
DK54578C
(en )
1938-04-11
Antenna connection circuit for Radio receivers.
DK56625C
(en )
1939-09-04
Control device for Radio Receivers.
DK57360C
(en )
1940-03-11
Device for oscillating circuits for automatic fine tuning of Superheterodyne receivers.
DK58769C
(en )
1941-06-16
Radio receiver with automatic Tuning.