THE FIRST OF THIS DEVICE WAS INVENTED BY HIPPOLYTE MARIE DAVY IN 1854.
SIMON LAKE USED THIS IN HIS SUBMARINES IN 1902. SIR HOWAED GRUBB PERFECTED THIS DEVICE IN WORLD WAR I. HOWEVER,MORGAN ROBERTSON(1861-1915) CLAIMED TO HAVE TRIED TO PATENT THIS DEVICE.WHICH DEVICE AM I TALKING ABOUT?????
ANSWER:PERISCOPE
SIMON LAKE USED THIS IN HIS SUBMARINES IN 1902. SIR HOWAED GRUBB PERFECTED THIS DEVICE IN WORLD WAR I. HOWEVER,MORGAN ROBERTSON(1861-1915) CLAIMED TO HAVE TRIED TO PATENT THIS DEVICE.WHICH DEVICE AM I TALKING ABOUT?????
ANSWER:PERISCOPE
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