DK8937C
(en )
1906-10-08
Connection device for Telephone system with Central battery.
DK7399C
(en )
1905-03-20
Air-insulated Telephone and Telegraph Cable.
DK5589C
(en )
1903-04-14
Device for wiring connections to telephone exchanges with battery at the exchange.
FR377785A
(en )
1907-09-14
Telephone transmission device
CH36228A
(en )
1906-12-31
Telephone installation
DK7171C
(en )
1904-12-19
Telephone connection device.
DK10739C
(en )
1908-04-21
Telephone Dialing Device.
DK4554C
(en )
1902-02-10
Device for telephone sets with the same cable for several subscribers.
CH39394A
(en )
1908-03-02
Self-connecting telephone system
CH36577A
(en )
1907-02-15
Self-connecting telephone system
CH37539A
(en )
1907-06-15
Self-connecting telephone system
DK7456C
(en )
1905-04-17
Telephone system with Group Stations.
DK7821C
(en )
1905-09-11
Connection cable for Telephone system.
FR380921A
(en )
1907-12-21
Telephone communications table
DK11435C
(en )
1908-11-09
Device for connecting the wires at automatic telephone stations with group division.
DK6562C
(en )
1904-05-24
Telephone connection device with quiescent current operation.
DK9119C
(en )
1906-12-17
Device at the branch lines in low-voltage systems with multiplet wire connection.
DK7240C
(en )
1905-01-23
Device for Group Line Telephone Systems.
CH28982A
(en )
1904-06-30
Release device on self-connecting telephone systems with switching shaft for establishing the connection between the subscriber lines
DK8580C
(en )
1906-06-25
Device at Telephone exchanges with separate Plug operation.
DK7239C
(en )
1905-01-23
Central switching device for Telephone Systems.
DK5793C
(en )
1903-07-13
Arrangement of the Work Magnets in Automatic Telephone Devices.
ES36679A1
(en )
1905-10-01
An Electrical Switching device entitled Electro-igniter-damper.
DK6982C
(en )
1904-10-10
Calling device for several telephone sets on a double cable.
CH34483A
(en )
1906-04-30
Device to expose photosensitive substrates one after the other