|
DK4272C
(en)
|
|
Automatic telephone switching device.
|
|
AT21080B
(en)
|
|
Automatic telephone switch.
|
|
AT25443B
(en)
|
|
Automatic telephone switch.
|
|
DK3701C
(en)
|
|
Automatic Alenmaal.
|
|
DK5959C
(en)
|
|
Device for automatic telephone devices.
|
|
CH23238A
(en)
|
|
Switching device for telephone exchanges
|
|
ES29393A1
(en)
|
|
Improvements in automatic telephone changes.
|
|
ES27677A1
(en)
|
|
A current limiting device.
|
|
DK7239C
(en)
|
|
Central switching device for Telephone Systems.
|
|
ES32684A1
(en)
|
|
A telephone switchboard.
|
|
DK5683C
(en)
|
|
Switching device for several call stations located on one line.
|
|
CH40705A
(en)
|
|
Selector for automatic telephone switches
|
|
ES28317A1
(en)
|
|
An automatic life-saving device.
|
|
ES27902A1
(en)
|
|
A new automatic electrical switch.
|
|
DK7171C
(en)
|
|
Telephone connection device.
|
|
DK7039C
(en)
|
|
Automatic telephone setting device.
|
|
ES27720A1
(en)
|
|
A device called automatic electric mail.
|
|
CH23295A
(en)
|
|
Automatic switch
|
|
ES36679A1
(en)
|
|
An Electrical Switching device entitled Electro-igniter-damper.
|
|
ES27671A1
(en)
|
|
A telephone relay.
|
|
DK5922C
(en)
|
|
Calling device for automatically operating Telephone Systems.
|
|
FR331220A
(en)
|
|
Button-switch for telephone ringtones
|
|
CH24498A
(en)
|
|
Telephone system
|
|
DK2889C
(en)
|
|
Devices for Automatic Telephone Connectors.
|
|
ES27926A1
(en)
|
|
Improvements in automatic warning devices.
|