CH467567A
(en )
1969-01-15
Circuit arrangement in telecommunications, in particular telephone switching systems
AT274054B
(en )
1969-09-10
Circuit arrangement for centrally controlled telecommunications systems, in particular telephone switching systems
CH435387A
(en )
1967-05-15
Circuit arrangement for telecommunications, in particular telephone systems, with central billing
AT260310B
(en )
1968-02-26
Circuit arrangement for telecommunication switching systems, in particular telephone switching systems with switching networks
CH413923A
(en )
1966-05-31
Circuit arrangement for telecommunication switching systems, in particular telephone switching systems
CH445574A
(en )
1967-10-31
Circuit arrangement for telecommunications switching systems, in particular telephone systems with switching fields
CH440387A
(en )
1967-07-31
Circuit arrangement for switching systems, in particular telephone switching systems
AT257701B
(en )
1967-10-25
Circuit arrangement for telecommunication, in particular telephone systems with two-way connections
AT246233B
(en )
1966-04-12
Circuit arrangement for telecommunications, in particular telephone systems
CH411045A
(en )
1966-04-15
Subscriber circuit for telecommunications, in particular telephone systems
AT290633B
(en )
1971-06-11
Circuit arrangement for telecommunication switching systems, in particular telephone switching systems
AT281128B
(en )
1970-05-11
Circuit arrangement for telecommunications switching systems, in particular telephone branch exchange systems
CH453437A
(en )
1968-06-14
Circuit arrangement for telecommunication switching systems, in particular telephone systems
CH427920A
(en )
1967-01-15
Circuit arrangement for telecommunications switching systems, in particular telephone switching systems, with multi-stage switching matrices
CH536586A
(en )
1973-04-30
Circuit arrangement for telecommunication, in particular telephone switching systems, with time division multiple operation
AT288495B
(en )
1971-03-10
Circuit arrangement for centrally controlled switching systems, in particular telephone switching systems
CH423893A
(en )
1966-11-15
Circuit arrangement for telecommunication switching systems with markings, in particular telephone switching systems
CH534991A
(en )
1973-03-15
Selection circuit, especially for telecommunications switching systems
AT294198B
(en )
1971-11-10
Circuit arrangement for telecommunications, in particular telephone switching systems
CH414764A
(en )
1966-06-15
Multi-stage coupling arrangement for telecommunications, in particular telephone switching systems
AT294930B
(en )
1971-12-10
Arrangement for telecommunications switching systems, in particular telephone systems
AT304649B
(en )
1973-01-10
Circuit arrangement for telecommunication switching systems, in particular telephone switching systems
CH417698A
(en )
1966-07-31
Circuit arrangement for telecommunication, in particular telephone systems, in which switching indicators are temporarily stored
CH449715A
(en )
1968-01-15
Circuit arrangement for multi-level switching panels in telecommunication systems, in particular telephone systems
AT274053B
(en )
1969-09-10
Circuit arrangement for telecommunications, in particular telephone systems