CH331073A
(en )
1958-06-30
Telecommunication system
CH339258A
(en )
1959-06-30
Circuit arrangement for switching systems
CH320152A
(en )
1957-03-15
Circuit arrangement with reversing device for telecommunications systems
CH313271A
(en )
1956-03-31
Circuit arrangement for an automatic telephone system
AT174089B
(en )
1953-02-25
Circuit arrangement for telephone systems with sub-exchanges
AT174090B
(en )
1953-02-25
Circuit arrangement for telephone systems with direct dialing
AT180325B
(en )
1954-11-25
Switching device
AT185410B
(en )
1956-04-25
Circuit arrangement for telephone extension systems with dialer operation
AT181636B
(en )
1955-04-12
Circuit arrangement for telephone extension systems with dialer operation
CH318094A
(en )
1956-12-15
Circuit arrangement in telephone systems with pulse control via cordoned off lines
FR1098057A
(en )
1955-07-18
Electrical calculator circuits
AT188765B
(en )
1957-02-11
Circuit arrangement for telephone systems with two-way connections
AT174955B
(en )
1953-05-26
Circuit arrangement for multiple telephones
AT175613B
(en )
1953-07-25
Subscriber circuit for teleprinter systems
AT170194B
(en )
1952-01-25
Circuit arrangement for sub-exchanges in telephone systems with dialer operation
AT173488B
(en )
1952-12-27
Circuit arrangement for sub-exchanges in telephone systems with dialer operation
AT186021B
(en )
1956-06-25
Switching device for thermostats
AT173738B
(en )
1953-01-26
Selector device for telecommunications systems
CH302752A
(en )
1954-10-31
Circuit arrangement for telephone systems with main and sub-offices.
AT199229B
(en )
1958-08-25
Circuit arrangement for telephone systems
CH311994A
(en )
1955-12-15
Circuit arrangement for telex extension systems with dialer operation.
AT173486B
(en )
1952-12-27
Circuit arrangement in telephone systems with group dialers
AT179806B
(en )
1954-10-11
Circuit arrangement for zoning devices for telephone systems
CH323788A
(en )
1957-08-15
Circuit arrangement for telecommunications systems with motor selectors
AT179158B
(en )
1954-07-26
Detent device