DK51548C
(en )
1936-04-20
Automatic Volume control device for Radio Receivers and other Amplifiers of electrical Oscillations.
DK51910C
(en )
1936-07-20
Device for Radio Receivers and other High Frequency Amplifiers for Automatic Sensitivity Control.
DK51911C
(en )
1936-07-20
Device for Radio Receivers and other High Frequency Amplifiers for Automatic Sensitivity Control.
DK47657C
(en )
1933-08-21
Automatic volume control device for Radio Receivers and High Frequency Amplifiers.
DK58388C
(en )
1941-02-03
Device for Radio Receivers and other High Frequency Amplifiers with Automatic Gain Control.
DK51135C
(en )
1936-01-13
Device for Radio Receivers and Other High Frequency Amplifiers for Selectivity Control.
DK47713C
(en )
1933-09-04
Device for Volume Control for Radio Receivers and High Frequency Amplifiers.
FR762941A
(en )
1934-04-20
Radio frequency amplifiers
DK50608C
(en )
1935-09-02
Device for High Frequency Transformers in Radio Receivers or Other High Frequency Amplifiers.
DK53822C
(en )
1937-11-08
Automatic Tuning Device for Radio Receivers.
DK49933C
(en )
1935-02-25
Device for Radio Receivers for Elimination of Unwanted Frequencies.
DK57490C
(en )
1940-04-15
Device for Tuning Elements for Radio Receivers and Other High Frequency Amplifiers.
DK50650C
(en )
1935-09-16
Device for Radio Receivers and similar Devices for combined Sound and Volume Control.
DK48578C
(en )
1934-04-03
Input oscillation circuit device for Radio receivers.
DK46567C
(en )
1932-11-28
Device for Radio Receivers or other tunable High Frequency Amplifiers.
DK59346C
(en )
1941-12-29
Device for Radio Receivers and Amplifiers for Automatic Bandwidth Adjustment.
DK57359C
(en )
1940-03-11
Device with High Frequency Amplifiers, in particular Radio Receivers, for automatic Adjustment of the Selectivity.
DK55876C
(en )
1939-02-27
Automatic Fine Tuner for Radio Receivers or Other High Frequency Amplifiers.
DK46309C
(en )
1932-10-10
Device for Adjusting the Volume of Radio Receivers.
FR811239A
(en )
1937-04-09
Amplifier for radio receiver and phonograph
DK53892C
(en )
1937-11-22
Control device for Radio Receivers.
DK48416C
(en )
1934-02-19
Device for Suppression of Background Noise in Radio Devices and High Frequency Amplifiers.
DK50125C
(en )
1935-04-08
Coupling for Volume control of Amplifiers.
FR771209A
(en )
1934-10-03
Selective circuit arrangement for radio receivers
DK51125C
(en )
1936-01-06
Device for amplifiers for electrical oscillations.