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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Submarine Signal Co
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Submarine Signal Co
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Publication date
Application filed by Submarine Signal CofiledCriticalSubmarine Signal Co
Application grantedgrantedCritical
Publication of FR495365ApublicationCriticalpatent/FR495365A/fr
H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
G—PHYSICS
G01—MEASURING; TESTING
G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
FR495365A1917-12-311919-01-28Perfectionnements dans les procédés et appareils pour la découverte et la production d'ondes sonores ou autres
ExpiredFR495365A
(fr)
Perfectionnements dans les procédés et appareils de signalisation et de détection sous-marines et de propagation dans les fluides d'ondes de compression
Appareil pour la transmission et la reproduction d'ondes acoustiques, pour la phonocinématographie, le photogramophone et des applications analogues