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DK4602C
(en)
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Wire connection at telephone exchange stations.
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US715425A
(en)
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Swiveled-valve pipe-union.
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CH27601A
(en)
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Self-collecting telephone station
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DK4534C
(en)
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Switching device for several intermediate stations located on one line.
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DK5683C
(en)
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Switching device for several call stations located on one line.
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DK5139C
(en)
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Tap connection.
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AT25136B
(en)
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|
Automatic telephone exchange.
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CH25937A
(en)
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Telephone hearing tube
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GB190220739A
(en)
|
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Improvements in Automatic Telephone Exchange Systems.
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DK4639C
(en)
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Signal tubes for Multiplet telephone stations.
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DK4682C
(en)
|
|
Insulation compound.
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ES32684A1
(en)
|
|
A telephone switchboard.
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AT43518B
(en)
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|
Circuit arrangement for automatic telephone exchanges.
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AT55320B
(en)
|
|
Circuit arrangement for automatic telephone exchanges.
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DK4809C
(en)
|
|
Milking bucket.
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DK4554C
(en)
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|
Device for telephone sets with the same cable for several subscribers.
|
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CA78690A
(en)
|
|
Telephone exchange system
|
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DK18654C
(en)
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|
Telephone system for Duplex telephony on three wires.
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DK4515C
(en)
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|
Alternator.
|
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DK4570C
(en)
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|
Koøje.
|
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FR323811A
(en)
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|
Plunging stage for circuses, theaters, etc.
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FI1746A
(en)
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|
Telephone coordination
|
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DK5221C
(en)
|
|
Switching device for several telephones inserted in a common line in a telephone system.
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DK5917C
(en)
|
|
Arrangement by call counters on telephone exchanges.
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AT23200B
(en)
|
|
Electric soldering process.
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