BE359702A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE340847A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE351277A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE476206A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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CH95919A
(fr)
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Installation pour bureau central téléphonique.
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BE341578A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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US2791632A
(en)
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Combined telephone and dictation system
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BE369234A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE416389A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE369046A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE432949A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE482060A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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US1147390A
(en)
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Switches and circuits for automatic telephone-exchanges.
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BE365774A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE361645A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE372321A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE503645A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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CH95434A
(fr)
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Installation pour bureau central téléphonique automatique.
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BE350916A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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CH94330A
(fr)
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Installation téléphonique à répartition d'appels.
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CH106672A
(fr)
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Installation téléphonique pour bureau central à commutateurs automatiques.
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BE370229A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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CH191973A
(fr)
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Installation de téléphonie à longues distances.
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BE371832A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE393936A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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