AT73144B
(en )
1917-02-26
Circuit arrangement for electromagnetically adjustable switchgear, in particular for automatic telephone systems.
CH87307A
(en )
1920-12-01
Switching device, in particular for field telephones.
DK19355C
(en )
1914-10-12
Selector for Making Connections in Telephone Systems.
DK18827C
(en )
1914-05-18
Circuit Device for Telephone Systems.
AT80136B
(en )
1920-02-25
Circuit arrangement for telephone systems. Circuit arrangement for telephone systems.
AT62699B
(en )
1913-12-27
Circuit arrangement for automatic telephone systems.
AT82883B
(en )
1921-02-25
Automatic telephone system.
AT75560B
(en )
1919-02-25
Telephone switching system.
AT66318B
(en )
1914-08-25
Circuit arrangement for automatic switches in telephone exchanges.
GB191307125A
(en )
1914-03-19
Improved Test Circuit Arrangements for Telephone Systems.
AU1466714B
(en )
1915-05-25
Improvements in test circuit arrangements for automatic telephone systems
AT71121B
(en )
1916-02-10
Circuit arrangement for telephone systems operated with voters.
AT75552B
(en )
1919-02-25
Circuit arrangement for telephone systems with automatic or semi-automatic operation.
AU1466714A
(en )
1915-05-25
Improvements in test circuit arrangements for automatic telephone systems
DK18356C
(en )
1914-01-12
Power surge transmitter for automatic telephone systems.
GB102531A
(en )
1916-12-14
Improvements in Testing Arrangements for Machine Telephone Switching Systems.
AT71117B
(en )
1916-02-10
Circuit arrangement for telephone systems.
DK18316C
(en )
1914-01-05
Telephone system connection device with Selectors.
AU1176714B
(en )
1914-03-26
f Improved test circuit arrangements-for telephone systems
AT80147B
(en )
1920-02-25
Circuit arrangement for telephone systems with dialing circuit arrangement for telephone systems with dialer operation. in operation.
AT91078B
(en )
1923-01-25
Switching equipment, especially for field telephones.
AT43518B
(en )
1910-08-10
Circuit arrangement for automatic telephone exchanges.
AU1476014B
(en )
1914-11-23
Improved circuit arrangements for telephone or other systems
DK22593C
(en )
1917-11-19
Telephone system.
DK18997C
(en )
1914-07-06
Telephone system.