21.Who invented Telephone View Answer Report DiscussAnswer: ALEXANDER GRAHAM BELL Explanation:Currently no explanation available Improve this answer lets discuss in forum
22.Who invented Submarine View Answer Report DiscussAnswer: BUSHWELL Explanation:Currently no explanation available Improve this answer lets discuss in forum
23.Who invented Talkies View Answer Report DiscussAnswer: LEE DE FROST Explanation:Currently no explanation available Improve this answer lets discuss in forum
24.Who invented Seismograph View Answer Report DiscussAnswer: ROBERTS MALLET Explanation:Currently no explanation available Improve this answer lets discuss in forum
25.Who invented Sextant View Answer Report DiscussAnswer: HADLEY Explanation:Currently no explanation available Improve this answer lets discuss in forum