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Priority claimed from FR775466Aexternal-prioritypatent/FR74217E/fr
Application filed by Jean M BlanchardfiledCriticalJean M Blanchard
Publication of BE573472ApublicationCriticalpatent/BE573472A/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
Landscapes
Physics & Mathematics
(AREA)
Engineering & Computer Science
(AREA)
Acoustics & Sound
(AREA)
Multimedia
(AREA)
Indicating Or Recording The Presence, Absence, Or Direction Of Movement
(AREA)
Processing And Handling Of Plastics And Other Materials For Molding In General
(AREA)
BE573472A1957-12-031958-12-01Perfectionnements apportés aux appareils générateurs de vibrations sonores ou ultra-sonores.
BE573472A
(fr)