FR942202A
(en )
1949-02-02
Telegraph receivers
CH281911A
(en )
1952-03-31
Pulse modulation communications equipment.
CH277494A
(en )
1951-08-31
Automatic telecommunications switchgear.
CH271002A
(en )
1950-09-30
Telecommunication switchgear.
CH291689A
(en )
1953-06-30
Telegraph receiver.
CH271987A
(en )
1950-11-30
Device for the transmission of electrical oscillations of acoustic frequency.
CH284637A
(en )
1952-07-31
Circuit for reducing the distortion of electrical signals, especially television signals.
CH262132A
(en )
1949-06-15
Projection-type television receiver.
CH277063A
(en )
1951-08-15
Electroacoustic converter.
CH271780A
(en )
1950-11-15
Telegraph Receiver.
CH266251A
(en )
1950-01-15
Mixed circuit.
DK74485C
(en )
1952-07-28
High frequency transformer for transmitting electrical impulses.
CH275294A
(en )
1951-05-15
Mixed circuit.
CH281913A
(en )
1952-03-31
Non-linear electrical signal transmission arrangement.
CH280990A
(en )
1952-02-15
High frequency receiving device.
DK78463C
(en )
1954-11-22
High frequency transformer for electrical impulses.
CH291693A
(en )
1953-06-30
High-frequency transformer for undistorted transmission of electrical impulses.
DK76271C
(en )
1953-08-24
Coupling for generating short electrical impulses.
DK75096C
(en )
1952-12-08
Coupling for counting electrical impulses.
CH280332A
(en )
1952-01-15
Telephone station.
CH275293A
(en )
1951-05-15
Pendulum feedback receiver.
CH271526A
(en )
1950-10-31
Telephone.
CH273268A
(en )
1951-01-31
Television receiver.
CH271242A
(en )
1950-10-15
Mutator.
CH271784A
(en )
1950-11-15
Telephone.