AT75595B
(en )
1919-02-25
Number switch for subscriber stations in self-connecting telephone systems with automatic preselection.
AU1177614B
(en )
1915-06-01
Improvements in telephone systems inwhich automatic switches are employed
GB101047A
(en )
1916-09-11
Improvements in Automatic Telephone Systems.
GB103116A
(en )
1917-06-07
Improvements in Automatic Telephone Systems.
AU1570215B
(en )
1916-03-21
Improvements in telephone systems employing automatic switches
AT80147B
(en )
1920-02-25
Circuit arrangement for telephone systems with dialing circuit arrangement for telephone systems with dialer operation. in operation.
GB104171A
(en )
1917-08-09
Improvements in Automatic Telephone Systems.
GB109829A
(en )
1917-09-24
Improvements in Automatic Telephone Systems.
GB109830A
(en )
1917-09-24
Improvements in Automatic Telephone Systems.
AU1277914B
(en )
1915-06-01
Improvements in party-line automatic telephone systems
DK20140C
(en )
1915-05-03
Selector switch for Telephone Systems.
AU1277814B
(en )
1915-06-01
Improvements in automatic telephone systems
DK20253C
(en )
1915-06-21
Telephone exchange system with automatic Divert.
DK20070C
(en )
1915-04-12
Telephone exchange system with automatic Divert.
CH56247A
(en )
1912-10-16
Automatic telephone system with dialers with connecting contacts arranged in rows
AT75556B
(en )
1919-02-25
Circuit for telephone systems with dialer operation.
AT75593B
(en )
1919-02-25
Circuit arrangement for telephone systems with dialer operation.
AU634512B
(en )
1912-09-17
Improvements in automatic telephone exchange systems
DK19355C
(en )
1914-10-12
Selector for Making Connections in Telephone Systems.
AT91080B
(en )
1923-01-25
Electrical control system for automatic or semi-automatic telephone exchanges.
DK22255C
(en )
1917-07-09
Selector for Making Connections in Telephone Systems.
DK20465C
(en )
1915-08-23
Telephone exchange system with automatic Divert.
AT73118B
(en )
1917-02-26
Circuit arrangement for telephone systems with central battery operation.
AT75559B
(en )
1919-02-25
Impulse transmitter for fully automatic telephone stations.
GB116075A
(en )
1918-06-27
Improvements in Automatic Telephone Systems.