AT43518B
(en )
1910-08-10
Circuit arrangement for automatic telephone exchanges.
AT55320B
(en )
1912-09-10
Circuit arrangement for automatic telephone exchanges.
AT66318B
(en )
1914-08-25
Circuit arrangement for automatic switches in telephone exchanges.
AT62699B
(en )
1913-12-27
Circuit arrangement for automatic telephone systems.
AT43909B
(en )
1910-09-10
Circuit arrangement for automatic telephone systems.
AT53526B
(en )
1912-05-10
Circuit for semi-automatic telephone exchanges.
CH53340A
(en )
1912-02-16
Automatic telephone system
CH53341A
(en )
1912-02-16
Automatic telephone system
CH53855A
(en )
1912-04-01
Automatic telephone system
CH56280A
(en )
1912-10-16
Automatic telephone system
DK10201C
(en )
1907-11-11
Automatic Telephone Centers.
ES47130A1
(en )
1910-03-01
Improvements in automated telephone systems.
AT65751B
(en )
1914-07-25
Circuit for semi-automatic telephone systems.
CH47489A
(en )
1910-07-01
Circuit arrangement for telephone exchanges with automatic periodic calls from subscribers
AT80136B
(en )
1920-02-25
Circuit arrangement for telephone systems. Circuit arrangement for telephone systems.
DK21265C
(en )
1916-06-13
Wiring device at automatic telephone exchanges.
AT82883B
(en )
1921-02-25
Automatic telephone system.
AT48831B
(en )
1911-07-10
Telephone.
AT75551B
(en )
1919-02-25
Telephone circuit.
AT25136B
(en )
1906-07-25
Automatic telephone exchange.
AT42557B
(en )
1910-06-10
Circuit arrangement for external traffic in automatic telephone systems.
CH53676A
(en )
1912-03-16
Number switch for automatic telephone exchange
ES47450A1
(en )
1910-04-01
An automatic announcer.
ES48394A1
(en )
1910-09-01
An automatic announcer.
DK8992C
(en )
1906-11-05
Interlocking Telephone Funnel.