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G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
G01P11/00—Measuring average value of speed
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FR615045D1925-09-021925-09-02Nouvel appareil pour la détermination immédiate par lecture directe de la vitesse moyenne d'un véhicule
ExpiredFR615045A
(fr)