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EP0400017A1
(en)
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DATA TRANSMISSION SYSTEM.
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BE424095A
(cs)
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|
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US2652446A
(en)
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Release signal for telegraph systems
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US2599344A
(en)
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Telegraph exchange for lines with simplex or duplex characteristics
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US2761896A
(en)
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Telegraph repeater system
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US2337496A
(en)
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Multiway regenerative repeater
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US717776A
(en)
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Quadruplex telegraph system.
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US1891564A
(en)
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Circuit arrangement for telegraphic apparatus
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US313787A
(en)
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Means for preventing |
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US707557A
(en)
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Telegraphic apparatus.
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US2350589A
(en)
|
|
Telephone or like system
|
|
US366695A
(en)
|
|
Quadruplex telegraphy |
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BE528427A
(cs)
|
|
|
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US1242009A
(en)
|
|
Impulse-control system.
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BE486685A
(cs)
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US883530A
(en)
|
|
Telegraph-repeater.
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US2195973A
(en)
|
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Start-stop repeater system
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BE353046A
(cs)
|
|
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SU530659A3
(ru)
|
|
Устройство дл дистанционного выключени телетайпной абонентской установки
|
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US1218413A
(en)
|
|
Quadruplex telegraphy.
|
|
US322688A
(en)
|
|
Ments |
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GB373650A
(cs)
|
|
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US553957A
(en)
|
|
Telegraphy |
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US1205248A
(en)
|
|
Printing-telegraph apparatus.
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USRE14304E
(en)
|
|
Belay |