AT55320B
(en )
1912-09-10
Circuit arrangement for automatic telephone exchanges.
AT43518B
(en )
1910-08-10
Circuit arrangement for automatic telephone exchanges.
AT53526B
(en )
1912-05-10
Circuit for semi-automatic telephone exchanges.
CH54232A
(en )
1912-05-01
Automatic telephone dialer
AT66318B
(en )
1914-08-25
Circuit arrangement for automatic switches in telephone exchanges.
CH57406A
(en )
1913-01-02
Call facility for telephone systems with several party lines
AT43909B
(en )
1910-09-10
Circuit arrangement for automatic telephone systems.
CH36228A
(en )
1906-12-31
Telephone installation
AT62699B
(en )
1913-12-27
Circuit arrangement for automatic telephone systems.
AT65751B
(en )
1914-07-25
Circuit for semi-automatic telephone systems.
AT75581B
(en )
1919-02-25
Telephone station with dialing device for self-connection for automatic telephone exchanges.
FR380921A
(en )
1907-12-21
Telephone communications table
AT71459B
(en )
1916-03-27
Circuit arrangement for telephone exchanges with semi-automatic operation.
CH53676A
(en )
1912-03-16
Number switch for automatic telephone exchange
AT54954B
(en )
1912-08-26
Circuit arrangement for dialers of self-connecting telephone systems.
CH55448A
(en )
1912-08-16
Call counting device for telephone systems
CH52337A
(en )
1911-11-16
Call counting device for telephone systems
AU1822410B
(en )
1910-11-08
Automatic telephone exchanges
AT80147B
(en )
1920-02-25
Circuit arrangement for telephone systems with dialing circuit arrangement for telephone systems with dialer operation. in operation.
CH54231A
(en )
1912-05-01
Number switch for the subscriber stations of an automatic telephone system
GB191307127A
(en )
1914-03-25
Improved Circuit Arrangements for Telephone Exchanges with Automatic Selecting Devices.
AU278705B
(en )
1905-09-12
Telephone calls
CH56245A
(en )
1912-10-16
Call counters for telephone stations
CH57407A
(en )
1913-02-17
Telephone switchboard
AT80097B
(en )
1920-02-25
Telephone dialer. Telephone dialer.