Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Societe Francaise Radio Electrique
Original Assignee
Societe Francaise Radio Electrique
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Filing date
Publication date
Application filed by Societe Francaise Radio ElectriquefiledCriticalSociete Francaise Radio Electrique
Application grantedgrantedCritical
Publication of FR564595ApublicationCriticalpatent/FR564595A/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
G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
G10K11/18—Methods or devices for transmitting, conducting or directing sound
G10K11/20—Reflecting arrangements
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Physics & Mathematics
(AREA)
Engineering & Computer Science
(AREA)
Acoustics & Sound
(AREA)
Multimedia
(AREA)
FR564595D1922-07-191922-07-19
Improvements in sound recording or transmission devices
ExpiredFR564595A
(en)