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DK4852C
(en)
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Device for Telephone System with Central Microphone Battery.
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DK4992C
(en)
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Device for Phones with Call Counter.
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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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DK5241C
(en)
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Device by Microphones.
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DK7171C
(en)
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Telephone connection device.
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CH26991A
(en)
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Telephone system
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DK5102C
(en)
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Telephone device with strong sound reproduction.
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FR323265A
(en)
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Advanced microphone system for telephone devices, etc.
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CH33516A
(en)
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Self-collecting telephone system
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DK4147C
(en)
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Telephone system with associated Device.
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FR328528A
(en)
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Microphone system for telephone devices
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DK7240C
(en)
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Device for Group Line Telephone Systems.
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DK5850C
(en)
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Adjustable Speaker for Telephone Devices.
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FR360452A
(en)
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Telephone system
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FR343546A
(en)
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Phone system
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CH30402A
(en)
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Microphone for telephone devices
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DK4762C
(en)
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Device at Cyklelaase.
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DK5230C
(en)
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Device at Laase.
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DK5296C
(en)
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Device at Møllesten.
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DK7010C
(en)
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Interrupt device for Pair Phones.
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DK6562C
(en)
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Telephone connection device with quiescent current operation.
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CH30654A
(en)
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Telephone system
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CH31509A
(en)
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Telephone system
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DK7238C
(en)
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Device for Telephone Connections.
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DK7848C
(en)
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Alarm device for use with telephone sets.
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