CH53676A
(en )
1912-03-16
Number switch for automatic telephone exchange
AT53526B
(en )
1912-05-10
Circuit for semi-automatic telephone exchanges.
CH74492A
(en )
1917-03-01
Selector switch for telephone systems
CH54232A
(en )
1912-05-01
Automatic telephone dialer
FR476461A
(en )
1915-08-05
Automatic telephone switch
AT43518B
(en )
1910-08-10
Circuit arrangement for automatic telephone exchanges.
AT55320B
(en )
1912-09-10
Circuit arrangement for automatic telephone exchanges.
AT65751B
(en )
1914-07-25
Circuit for semi-automatic telephone systems.
CH54231A
(en )
1912-05-01
Number switch for the subscriber stations of an automatic telephone system
AT63202B
(en )
1914-01-26
Selector for automatic or semi-automatic telephone switching devices.
CH54933A
(en )
1912-07-01
Equipment for automatic or partially automatic telephone systems
CH63680A
(en )
1914-02-16
Automatic switching device for step resistance
ES48475A1
(en )
1910-09-01
An automatic switch for dual phone lines.
CH59283A
(en )
1913-05-16
Switching for automatic or semi-automatic telephone systems
AT66318B
(en )
1914-08-25
Circuit arrangement for automatic switches in telephone exchanges.
CH56245A
(en )
1912-10-16
Call counters for telephone stations
FR501273A
(en )
1920-04-08
Automatic telephone switch
AU1822410B
(en )
1910-11-08
Automatic telephone exchanges
FR448216A
(en )
1913-01-25
Automatic telephone switch
CH53986A
(en )
1912-04-16
Switching device for counters
FR415455A
(en )
1910-09-27
Automatic telephone
CH57166A
(en )
1912-12-16
Jack strips for telephone switch cabinets
FR433968A
(en )
1912-01-20
Automatic telephony installations
AT75581B
(en )
1919-02-25
Telephone station with dialing device for self-connection for automatic telephone exchanges.
CH63714A
(en )
1914-02-16
Selector for automatic telephone switches