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DK21911C
(en)
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Device by Detectors for Sound Waves.
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SU6272A1
(en)
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Sound box
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DK31175C
(en)
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Device for Direction Determination of Sound Waves.
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DK29827C
(en)
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Receiving device for underwater sound signals.
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DK26696C
(en)
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Device at Møllestene.
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DK21774C
(en)
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Device by Dejdelemaskiner.
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DK22294C
(en)
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Device by Fiskeruser.
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DK24866C
(en)
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Device by Stollemaskiner.
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DK34229C
(en)
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Device by Termion Amplifiers.
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DK22284C
(en)
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Sound funnel for Microphones.
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ES64679A3
(en)
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An acoustic warning device.
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DK31688C
(en)
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Device at sound transmitter system.
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DK31742C
(en)
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Device for Direction Determination of Sound Waves.
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DK21825C
(en)
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Device at Kaffekværne.
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DK22699C
(en)
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Device at Spareure.
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DK23026C
(en)
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Device at Smedeesser.
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DK23393C
(en)
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Device at Spareure.
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DK23425C
(en)
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Device at Haandjærn.
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DK24561C
(en)
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Device at Kogekar.
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DK24638C
(en)
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Device at Laase.
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DK24202C
(en)
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Device by Splitter.
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DK28212C
(en)
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Device for underwater sound devices.
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DK21799C
(en)
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Device at lathes.
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DK22370C
(en)
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Device by Gas Generators.
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DK25027C
(en)
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Device by Concrete Vessels.
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