FR989540A
(en )
1951-09-10
Electrical signal receiver
FR1074061A
(en )
1954-10-01
Signal finder type radio receiver
CH279120A
(en )
1951-11-15
Circuit arrangement in an automatic signal system.
FR987802A
(en )
1951-08-20
Electrical signal receiver
CH295853A
(en )
1954-01-15
Circuit arrangement for automatic frequency control.
CH273263A
(en )
1951-01-31
Circuit for an automatic signal system to excite an occupancy relay of a switch.
FR1054285A
(en )
1954-02-09
Relay system
CH307450A
(en )
1955-05-31
Circuit for time-staggered triggering of switching processes.
FR1062795A
(en )
1954-04-27
Signal receiver
CH312614A
(en )
1956-01-31
Circuit arrangement for telecommunication systems for issuing different indicators
AT179311B
(en )
1954-08-10
Relays, in particular for railway signal systems
CH273074A
(en )
1951-01-31
Box-shaped diaphragm for electrolytic purposes.
AT174083B
(en )
1953-02-25
Automatic coupling for railway vehicles
AT169985B
(en )
1951-12-27
Circuit for automatic signaling systems for selective testing of the value of characteristic resistors
FR927092A
(en )
1947-10-20
Electronic multi-circuit relay
AT179563B
(en )
1954-09-10
Signal level control arrangement for a signal transmission system
FR1065372A
(en )
1954-05-24
Improvements to automatic switches or flashers
AT170782B
(en )
1952-03-25
Relay circuit for fully automatic motor control
AT169908B
(en )
1951-12-27
Switch circuit for railway safety systems
AT175846B
(en )
1953-08-25
Contactor for weir systems
CH278141A
(en )
1951-09-30
Circuit arrangement for an electrical signal system for establishing a connection between a call line and a register by means of a call finder.
CH273880A
(en )
1951-02-28
Crossbar switch for automatic telephone systems.
FR1033964A
(en )
1953-07-17
Electronic control relay
AT166943B
(en )
1950-10-10
Circuit for transit time tube
FR1081991A
(en )
1954-12-24
Automatic switch for signaling the braking of all vehicles