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Signal GmbH
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Signal GmbH
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Application filed by Signal GmbHfiledCriticalSignal GmbH
Application grantedgrantedCritical
Publication of FR512131ApublicationCriticalpatent/FR512131A/en
G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
G10K9/10—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by mechanical means only
FR512131A1914-10-151915-12-30
transmitter for underwater acoustic signals
ExpiredFR512131A
(en)