|
SE125678C1
(enrdf_load_stackoverflow)
|
|
|
|
DE887525C
(de)
|
|
Schaltungsanordnung zur Feststellung der Nummer eines anrufenden Teilnehmers in Fernmeldeanlagen, insbesondere Fernsprechanlagen
|
|
US3267216A
(en)
|
|
Automatic charge metering of telephone calls
|
|
US2211159A
(en)
|
|
Automatic telephone system
|
|
NO138909B
(no)
|
|
Fremgangsmaate til demetallisering av en hydrocarbonolje i naervaer av hydrogen og en katalysator av vanadium og nikkel paa siliciumoxydbaerer
|
|
US2153306A
(en)
|
|
Telephone system
|
|
US2185287A
(en)
|
|
Telephone system
|
|
GB510012A
(en)
|
|
Improvements in or relating to telecommunication systems
|
|
US2327458A
(en)
|
|
Testing system
|
|
US2570239A
(en)
|
|
Time zone telephone metering system
|
|
US2358593A
(en)
|
|
Teletypewriter recording system
|
|
US3169169A
(en)
|
|
Traffic observation system
|
|
US3339028A
(en)
|
|
Arrangements for detecting ground conditions on telephone lines
|
|
US1795350A
(en)
|
|
Service observation in telephone systems using call indicators
|
|
US3242266A
(en)
|
|
Circuit arrangement for relay controlled pbx installations
|
|
US1614285A
(en)
|
|
Trouble-indicating system
|
|
GB391629A
(en)
|
|
Improvements in and relating to automatic telephone and like systems
|
|
US1823338A
(en)
|
|
Dial switching toll system
|
|
US2651680A
(en)
|
|
Dual-use register sender
|
|
SE182717C1
(enrdf_load_stackoverflow)
|
|
|
|
GB471764A
(en)
|
|
Improvements relating to telephone systems
|
|
US2633499A
(en)
|
|
Telecommunication switching system
|
|
DE970537C
(de)
|
|
Schaltungsanordnung fuer Fernmelde-, insbesondere Feuermeldeanlagen
|
|
DE952361C
(de)
|
|
Schaltungsanordnung fuer Fernsprechanlagen mit Waehlerbetrieb und Registrierung der vom Teilnehmer gewaehlten Rufnummer
|
|
King
|
|
Centralized automatic message accounting system |