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DK18654C
(en)
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Telephone system for Duplex telephony on three wires.
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AT75560B
(en)
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Telephone switching system.
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DK33446C
(en)
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Cordless Telephone System.
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DK34938C
(en)
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Telephone system.
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AT91078B
(en)
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Switching equipment, especially for field telephones.
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DK19507C
(en)
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Distribution system for Telephone cables.
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DK18997C
(en)
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Telephone system.
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DK22593C
(en)
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Telephone system.
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CH87307A
(en)
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Switching device, in particular for field telephones.
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AT89309B
(en)
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Telephone switching system.
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AT82822B
(en)
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Telephone switching system.
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DK18509C
(en)
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Telephone handover system.
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AT80136B
(en)
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Circuit arrangement for telephone systems. Circuit arrangement for telephone systems.
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AT82832B
(en)
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Telephone switching system.
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DK32848C
(en)
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Telephone exchange system.
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DK20370C
(en)
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Telephone exchange system.
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AT82883B
(en)
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Automatic telephone system.
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ES58374A1
(en)
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Telephone.
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CH64775A
(en)
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Connection for electrical conductors, cables etc.
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DK17225C
(en)
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Connecting device for semi-automatic Telephone systems.
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DK18626C
(en)
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Telephone exchange system.
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FR495108A
(en)
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Announcer for telephone calls
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DK20581C
(en)
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Induction transmitter for Telephone cables.
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DK18500C
(en)
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Telephone relay.
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DK35237C
(en)
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Telephone system.
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