AT75581B
(en )
1919-02-25
Telephone station with dialing device for self-connection for automatic telephone exchanges.
DK14160C
(en )
1911-01-30
Connection device for automatic Telephone Stations.
DK13958C
(en )
1910-12-05
Device for automatic connection between the Participants in a Telephone Exchange.
AT43518B
(en )
1910-08-10
Circuit arrangement for automatic telephone exchanges.
AT55320B
(en )
1912-09-10
Circuit arrangement for automatic telephone exchanges.
AT75559B
(en )
1919-02-25
Impulse transmitter for fully automatic telephone stations.
ES51258A1
(en )
1912-01-16
Communication device for automatic telephone installations.
AT53526B
(en )
1912-05-10
Circuit for semi-automatic telephone exchanges.
CH53497A
(en )
1912-03-01
Device for setting voters in automatic telephone exchanges
CH53676A
(en )
1912-03-16
Number switch for automatic telephone exchange
GB191307127A
(en )
1914-03-25
Improved Circuit Arrangements for Telephone Exchanges with Automatic Selecting Devices.
DK14613C
(en )
1911-05-29
Connecting device for semi-automatic Telephone exchanges.
CH54232A
(en )
1912-05-01
Automatic telephone dialer
DK18036C
(en )
1913-11-03
Automatic device for detecting calls on a telephone exchange.
ES48155A1
(en )
1910-08-01
Improvements in automatic telephone stations.
DK17069C
(en )
1913-03-17
Switching device for Telephone exchanges.
AU254711B
(en )
1912-03-26
Improved selector for automatic telephone exchanges
AT66318B
(en )
1914-08-25
Circuit arrangement for automatic switches in telephone exchanges.
DK14321C
(en )
1911-03-06
Number setting for an Automatic Telephone System Subscriber Stations.
DK13975C
(en )
1910-12-05
Wiring Connection and Device for Setting Up Dialers in Automatic Telephone Centers.
CH47489A
(en )
1910-07-01
Circuit arrangement for telephone exchanges with automatic periodic calls from subscribers
ES55153A1
(en )
1913-05-16
Improvements in selectors designed especially for automatic telephone installations.
AU1822410B
(en )
1910-11-08
Automatic telephone exchanges
ES47130A1
(en )
1910-03-01
Improvements in automated telephone systems.
FR14297E
(en )
1911-10-24
Automatic counting device for telephone calls