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Hermes Patentverwertungs GmbH
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Hermes Patentverwertungs GmbH
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Application filed by Hermes Patentverwertungs GmbHfiledCriticalHermes Patentverwertungs GmbH
Application grantedgrantedCritical
Publication of FR53826EpublicationCriticalpatent/FR53826E/fr
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
G10K5/00—Whistles
G10K5/02—Ultrasonic whistles
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Physics & Mathematics
(AREA)
Engineering & Computer Science
(AREA)
Acoustics & Sound
(AREA)
Multimedia
(AREA)
FR53826D1944-06-211944-06-21Dispositif pour produire des oscillations sonores ou ultra-sonores dans les liquides
ExpiredFR53826E
(fr)