AT66318B
(en )
1914-08-25
Circuit arrangement for automatic switches in telephone exchanges.
AT43518B
(en )
1910-08-10
Circuit arrangement for automatic telephone exchanges.
AT55320B
(en )
1912-09-10
Circuit arrangement for automatic telephone exchanges.
AT43909B
(en )
1910-09-10
Circuit arrangement for automatic telephone systems.
FR369419A
(en )
1907-01-11
Automatic circuit breaker
AT62699B
(en )
1913-12-27
Circuit arrangement for automatic telephone systems.
ES47130A1
(en )
1910-03-01
Improvements in automated telephone systems.
AT53526B
(en )
1912-05-10
Circuit for semi-automatic telephone exchanges.
AT42557B
(en )
1910-06-10
Circuit arrangement for external traffic in automatic telephone systems.
ES48155A1
(en )
1910-08-01
Improvements in automatic telephone stations.
GB191026079A
(en )
1911-11-09
Circuit and Device for Operating Selectors in Automatic Telephone Exchanges.
FR10091E
(en )
1909-04-23
Automatic telephone switch
FR8813E
(en )
1908-07-04
Automatic telephone switch
DK10201C
(en )
1907-11-11
Automatic Telephone Centers.
AT42118B
(en )
1910-05-10
Call counter circuit.
FR366216A
(en )
1906-09-29
Circuit breaker
DK10963C
(en )
1908-06-22
Switchboard for Telephone exchanges.
CH53676A
(en )
1912-03-16
Number switch for automatic telephone exchange
AT80136B
(en )
1920-02-25
Circuit arrangement for telephone systems. Circuit arrangement for 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
ES52017A1
(en )
1912-03-16
Improvements in telephone transmissions.
AT75551B
(en )
1919-02-25
Telephone circuit.
DK21265C
(en )
1916-06-13
Wiring device at automatic telephone exchanges.
AT75560B
(en )
1919-02-25
Telephone switching system.