|
DK448C
(en)
|
|
Apparatus for providing an automatic connection between two arbitrary subscriber lines at a telephone exchange.
|
|
FR336007A
(en)
|
|
Connection flange for pipes, etc.
|
|
DK7512C
(en)
|
|
Apparatus for Providing Connection between a Telephone Exchange Subscriber.
|
|
DK2839C
(en)
|
|
Device for automatically indicating at a telephone exchange station the end of a call.
|
|
DK988C
(en)
|
|
Automatic Telephone Setup System.
|
|
DK6982C
(en)
|
|
Calling device for several telephone sets on a double cable.
|
|
GB189622360A
(en)
|
|
An Improved Automatic Telephonic Exchange System.
|
|
GB189614500A
(en)
|
|
An Improved Call Counter suitable for Telephone Exchanges.
|
|
DK4602C
(en)
|
|
Wire connection at telephone exchange stations.
|
|
DK1084C
(en)
|
|
Devices for high-speed telegraphy on cable lines.
|
|
DK375C
(en)
|
|
Telephone connection system.
|
|
ES20102A1
(en)
|
|
A procedure for stack call telephone installations.
|
|
DK8300C
(en)
|
|
Device for Transferring Images from a Distance.
|
|
GB189513573A
(en)
|
|
Improvements in Multiple-switches for Telephone Exchanges.
|
|
ES18692A1
(en)
|
|
An automatic telephone communication system.
|
|
DK7260C
(en)
|
|
Electromagnetic Selection Apparatus for Use at the Central Station in a Group Line Telephone System.
|
|
GB189629107A
(en)
|
|
Telephone Exchange.
|
|
DK18036C
(en)
|
|
Automatic device for detecting calls on a telephone exchange.
|
|
CH28982A
(en)
|
|
Release device on self-connecting telephone systems with switching shaft for establishing the connection between the subscriber lines
|
|
ES37639A1
(en)
|
|
A telephony procedure called a Thomson telephone system B.
|
|
DK15C
(en)
|
|
Power connection for Telephone system.
|
|
DK3563C
(en)
|
|
Procedure with associated telegraph apparatus on telephone lines.
|
|
CA52892A
(en)
|
|
Automatic telephone exchange system
|
|
GB189614872A
(en)
|
|
Improvements in a System of Automatic Telephone Exchange.
|
|
DK786C
(en)
|
|
Receptor for submarine Telegraph lines.
|