CH276568A
(en )
1951-07-15
Subscriber circuit in an automatic telephone system.
CH324915A
(en )
1957-10-15
Circuit arrangement for telecommunications, in particular telephone systems
AT182752B
(en )
1955-08-10
Motor selector in telecommunication systems, in particular telephone systems
FR988281A
(en )
1951-08-24
Telephone switching system
CH315053A
(en )
1956-07-15
Circuit arrangement in telecommunication systems, in particular telephone systems
CH314163A
(en )
1956-05-31
Selector switches for telecommunication systems, in particular telephone systems
CH271526A
(en )
1950-10-31
Telephone.
CH280332A
(en )
1952-01-15
Telephone station.
CH282227A
(en )
1952-04-15
Telephone station with selector switch.
CH279483A
(en )
1951-11-30
Call finder circuit.
CH276786A
(en )
1951-07-31
Circular saw, in particular hand-held circular saw.
CH317711A
(en )
1956-11-30
Multiple switches for telecommunication systems, in particular telephone systems
CH274631A
(en )
1951-04-15
Circuit arrangement in telecommunications systems with dialer operation.
AT173737B
(en )
1953-01-26
Rotary selector for telecommunication systems, in particular telephone systems
CH271784A
(en )
1950-11-15
Telephone.
FR977153A
(en )
1951-03-28
Secret telephone communication system
BE486835A
(en )
1949-02-15
Telecommunication system.
CH301277A
(en )
1954-08-31
Telephone installation.
DK82440C
(en )
1956-12-03
Two-stage group selector equipment for use in telecommunication systems.
CH271839A
(en )
1950-11-15
Circuit arrangement in a small telephone exchange.
AT183457B
(en )
1955-10-10
Circuit arrangement for determining the zone value of a connection in telecommunication systems, in particular telephone systems with dialer operation
DK75049C
(en )
1952-12-01
Telephone subscriber device.
CH288597A
(en )
1953-01-31
Rotary selector for telecommunication systems, in particular telephone systems.
CH276286A
(en )
1951-06-30
Circuit arrangement for determining the zone value of a connection in telecommunications systems, in particular telephone systems, with dialer operation.
CH280041A
(en )
1951-12-31
Charge displays at subscriber stations in telecommunication systems, in particular telephone systems.