CH8100A
(en )
1894-08-31
Switching device for telephone systems
FR433791A
(en )
1912-01-16
Communication device for automatic telephone systems
CH8258A
(en )
1894-09-15
Automatic central telephone switch
CH11794A
(en )
1896-08-15
Automatically switching carrier for telephone ear cups
FR338252A
(en )
1904-05-14
Annunciator for telephone switchboards
CA39093A
(en )
1892-06-09
Signal for telephone pay stations
CA46791A
(en )
1894-08-09
Automatic electric signalling device
CH7124A
(en )
1894-01-31
Installation for the direct electrical communication of telegraph, telephone, etc. stations.
CH33520A
(en )
1905-12-15
Signaling device for telephone stations
GB189408317A
(en )
1895-03-09
Improvements in Switches for Use at Central Stations of Telephone Systems.
FR337652A
(en )
1904-04-20
Telephone system for several secondary stations connected to a common wire
FR343629A
(en )
1904-10-11
Device for automatic starting of motorcycles
CH10683A
(en )
1896-01-31
Improved membrane for telephones
CH7782A
(en )
1894-08-31
Pushchair device for watches
FR328528A
(en )
1903-07-16
Microphone system for telephone devices
FR420296A
(en )
1911-01-26
Provision for automatic telephone systems
FR470625A
(en )
1914-09-19
Secondary station switch for telephone systems
CH10438A
(en )
1895-12-15
Switch for central offices of telephone networks
FR318255A
(en )
1902-10-10
Switch for telephone and telegraph systems
FR432237A
(en )
1911-12-01
Switch for telephone systems
CH7797A
(en )
1894-06-30
Circuit for telephone systems
CH7798A
(en )
1894-06-30
Circuit for telephone systems
CA44829A
(en )
1893-12-05
Telephone exchange apparatus
CA44830A
(en )
1893-12-05
Switch for telephone exchanges
CH6149A
(en )
1893-06-30
New cadrau for watches