AT72189B
(en )
1916-07-25
Circuit arrangement for telephone systems with automatic or semi-automatic operation.
AT75552B
(en )
1919-02-25
Circuit arrangement for telephone systems with automatic or semi-automatic operation.
AT68533B
(en )
1915-04-26
Circuit arrangement for telephone systems with semi-automatic operation.
CH68410A
(en )
1915-03-16
Line arrangement for automatic or semi-automatic telephone systems
AT71117B
(en )
1916-02-10
Circuit arrangement for telephone systems.
AT69059B
(en )
1915-06-10
Circuit arrangement for telephone systems.
CH71981A
(en )
1916-03-16
Circuit arrangement for telephone systems with automatic or semi-automatic operation and group stations
AT63202B
(en )
1914-01-26
Selector for automatic or semi-automatic telephone switching devices.
GB191322850A
(en )
1914-06-18
Improved Circuit Arrangements for Automatic Telephone Systems.
AT71459B
(en )
1916-03-27
Circuit arrangement for telephone exchanges with semi-automatic operation.
CH67980A
(en )
1915-02-01
Circuit arrangement in telephone systems with semi-automatic operation
AT80136B
(en )
1920-02-25
Circuit arrangement for telephone systems. Circuit arrangement for telephone systems.
GB191306664A
(en )
1913-12-18
Improved Circuit Arrangements for Semi-automatic Telephone Systems.
GB191317417A
(en )
1914-07-29
Improved Circuit Arrangements for Telephone Systems.
GB191321222A
(en )
1913-12-04
Improved Circuit Arrangements for Telephone Systems.
AT65751B
(en )
1914-07-25
Circuit for semi-automatic telephone systems.
CH67367A
(en )
1914-12-01
Circuit arrangement in telephone systems with semi-automatic operation
CH67368A
(en )
1914-12-01
Circuit arrangement in telephone systems with semi-automatic operation
AT62699B
(en )
1913-12-27
Circuit arrangement for automatic telephone systems.
AT73118B
(en )
1917-02-26
Circuit arrangement for telephone systems with central battery operation.
AT75593B
(en )
1919-02-25
Circuit arrangement for telephone systems with dialer operation.
CH62691A
(en )
1913-12-16
Circuit arrangement for operating telephone systems with manual operation
AT75556B
(en )
1919-02-25
Circuit for telephone systems with dialer operation.
AT73144B
(en )
1917-02-26
Circuit arrangement for electromagnetically adjustable switchgear, in particular for automatic telephone systems.
AT80147B
(en )
1920-02-25
Circuit arrangement for telephone systems with dialing circuit arrangement for telephone systems with dialer operation. in operation.