Fountain Pen - Lewis E Waterman (1884)
Jet Engine - Sir Frank Whittle (1937)
Lift (Mechanical) - Elisha G Otis (1852)
Match, Safety - John Walker (1826)
Microphone - A Graham Bell (1876)
Microscope, compound - Z Janssen (1590)
Motor cycle - G Daimler (1885)
Neon Lamp - Georges Claude (1910)
Neutron - Chadwick (1932)
Pacemaker - Zoll (1952)

Periodic Table - Mendeleyev (1869)
Piano - Cristofori (1709)
Pistol (Revolver) - Colt (1836)
Postage stamp - Sir Rowland Hill (1840)
Radio telegraphy - G Marconi (1901)
Relative theory - Albert Einstein (1905)
Rubber (Tyre) - Thomas Hancock (1846)
Safety pin - Walter Hunt (1849)
Seat belt - Volvo (1959)
Stethoscope - Laennec (1819)

Swiss army Knife - Karl Elsener (1891)
Tank - Sir Ernest D Swington (1914)
Television, color - John Logie Baird (1928)
Uranium reactor - Fermi (1942)
X ray - Wilhem K Roentgen (1895)