DK59825C
(en )
1942-06-01
Radio receiver with delayed, automatic Volume control.
FR53543E
(en )
1946-03-04
Superheterodyne radio receiver with automatic frequency adjustment
DK60614C
(en )
1943-02-22
Radio receiver with automatic fading control and with low frequency bandwidth control.
DK58645C
(en )
1941-05-05
Telegraph receiver with Fading control.
DK54577C
(en )
1938-04-11
Radio receiver with Fading control and Tuning indicator.
DK55285C
(en )
1938-10-03
Radio receiver with Fading control and Tuning indicator.
DK58465C
(en )
1941-03-03
Radio receiver with automatic Volume control.
DK57180C
(en )
1940-01-22
Radio reception switch with automatic bandwidth control.
DK59046C
(en )
1941-09-22
Radio receiver with automatic Gain control.
CH208103A
(en )
1939-12-31
Radio receiver with fully automatic tuning.
CH219819A
(en )
1942-02-28
Receiver with automatic low-frequency bandwidth control.
CA388411A
(en )
1940-04-30
Radio receiver tone control
DK50558C
(en )
1935-08-19
Radio receiver with automatic Power control.
DK57432C
(en )
1940-04-01
Radio receiver with automatic Tuning.
DK59483C
(en )
1942-02-16
Radio receiver with automatic Tuning.
CA387127A
(en )
1940-02-27
Automatic radio frequency control
DK52249C
(en )
1936-10-05
Radio receiver with variable bandwidth.
CA388681A
(en )
1940-05-14
Radio receiver controlling means
CA389914A
(en )
1940-07-09
Superheterodyne radio receiver
CA392363A
(en )
1940-11-05
Superheterodyne radio receiver
CA387442A
(en )
1940-03-12
Superheterodyne radio receiver
CA392354A
(en )
1940-11-05
Superheterodyne radio receiver
DK64538C
(en )
1946-06-11
Overlay receiver with automatic Frequency control.
FR811875A
(en )
1937-04-24
Radio receiver with automatic fading control
CA387666A
(en )
1940-03-26
Automatic radio tuning control