Typewriter- Christopher Sholes  (1868)
Railroad Air Brake- George Westinghouse (1868)     

Barbed Wire- Joseph Glidden (1873)                                     

Telephone- Alexander Graham Bell (1876)

Submarine- John Holland (1881)                              

Linotype- Ottmar Mergenthaler (1884)

Shorthand- John Gregg (1888)

Adding Machine- William Burroughs (1888)

Machine Gun-  John Browing (1890)

Airplane- Wright Brothers (1903)

Foutain Pen- Lewis Waterman (1888)

Camera- George Eastman (1888)

Light bulb- Thomas Edison (1879)

Zipper- Whitcomb Judson (1890)

Escalator- Jesse Reno (1891)

Radio- Guglielmo Marconi (1895)