AT70550B
(en )
1915-11-25
Circuit arrangement for telephone exchanges with automatic call distribution.
AT62688B
(en )
1913-12-27
Circuit arrangement for telephone exchanges with automatic call distribution.
AT68425B
(en )
1915-04-10
Circuit arrangement for telephone exchanges with automatic call distribution.
AT44977B
(en )
1910-11-10
Circuit arrangement for automatic telephone exchanges.
AT56997B
(en )
1912-12-27
Automatic telephone dialer.
AT44976B
(en )
1910-11-10
Circuit arrangement for automatic telephone exchanges.
AT49847B
(en )
1911-09-11
Telephone station with dialing device for self-connection for automatic telephone exchanges.
AT56229B
(en )
1912-11-11
Circuit arrangement for automatic telephone systems.
AT49075B
(en )
1911-07-25
Automatic telephone dialer.
AT74845B
(en )
1918-10-25
Circuit arrangement for telephone systems.
AT62360B
(en )
1913-12-10
Circuit arrangement for traffic between several telephone exchanges equipped with automatic dialers.
AT72342B
(en )
1916-08-25
Circuit arrangement for intermediate switch for automatic or semi-automatic telephone exchanges with central battery operation.
AT74343B
(en )
1918-05-10
Self-collecting telephone station.
AT25281B
(en )
1906-08-10
Circuit for telephone exchanges with distribution system.
AT74347B
(en )
1918-05-10
Circuit arrangement for telephone exchanges which can be used preferably on warships.
AT23475B
(en )
1906-03-10
Circuit arrangement for telephone main stations.
AT37041B
(en )
1909-04-26
Automatic telephone switching system.
AT79130B
(en )
1919-11-10
Selector without zero position for telephone systems.
AT72181B
(en )
1916-07-25
Circuit arrangement for private branch exchanges with several trunk lines.
AT74825B
(en )
1918-10-25
Telephone switching system.
AT25888B
(en )
1906-10-10
Circuit arrangement for telephone exchanges.
AT25872B
(en )
1906-10-10
Circuit for telephone exchanges with automatic switching on and off of the ringing current source.
AT50093B
(en )
1911-10-10
Handset.
AT74045B
(en )
1917-12-10
Circuit arrangement for automatically or semi-automatically operated telephone systems with separate setting and speech connection paths.
AT76661B
(en )
1919-06-10
Circuit arrangement for automatic or semi-automatic telephone systems with separate adjustment and speech channels.