Facsimile (fax) : Alexander Bain, Scotland, 1842.
Fiber Optics : Narinder Kapany, England, 1955.
Film Photographic : George Eastman, U.S.A., 1884.
Flashlight, Battery-operated Portable : Conrad Hubert, Russia/U.S.A., 1899
Flask, Vacuum (Thermos) : Sir James Dewar, Scotland, 1892.
Fuel Cell : William R. Grove, U.K., 1839
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