CH262680A
(en )
1949-07-15
Circuit for amplifying an electrical signal.
CH298001A
(en )
1954-04-15
Electrical signaling device.
CH286291A
(en )
1952-10-15
Circuit arrangement for generating an electrical oscillation.
AT168852B
(en )
1951-09-10
Method for manufacturing an electrical switching unit
CH279079A
(en )
1951-11-15
Electrical switchgear.
CH262681A
(en )
1949-07-15
Circuit for amplifying an electrical signal.
CH296385A
(en )
1954-02-15
Electrical device for storing information.
CH273223A
(en )
1951-01-31
Device for limiting electrical currents.
CH269956A
(en )
1950-07-31
Circuit for generating pulsed currents or voltages.
AT170013B
(en )
1952-01-10
Circuit for amplifying an electrical voltage or an electrical current
CH287005A
(en )
1952-11-15
Circuit for generating a high DC voltage.
CH265059A
(en )
1949-11-15
Circuit for amplifying an electrical signal.
CH270967A
(en )
1950-09-30
Circuit breaker with magnetic spark suppression for alternating current.
CH285606A
(en )
1952-09-15
Circuit for amplifying an electrical power.
CH277061A
(en )
1951-08-15
Device for the electrical storage of messages.
CH285269A
(en )
1952-08-31
High voltage electrical switch.
CH295814A
(en )
1954-01-15
Electrical switchgear.
CH301566A
(en )
1954-09-15
Device for storing information occurring in the form of electrical signals.
CH290716A
(en )
1953-05-15
Arrangement for the interruption of direct currents in high voltage systems.
DK76487C
(en )
1953-10-12
Coupling for amplification of an electrical voltage or current.
DK79834C
(en )
1955-09-12
Coupling for amplification of an electrical voltage or current.
CH283604A
(en )
1952-06-15
Circuit for time modulation of electrical pulses.
ES189082A1
(en )
1950-03-01
AN ELECTRICAL CURRENT LEVELER
CH274603A
(en )
1951-04-15
Device on small electric motors to regulate the speed of the same.
DK81512C
(en )
1956-11-26
Electrical switchgear.