| A | B |
| Frederick Koening-1810 | invented an improved printing press |
| Samuel Colt-1836 | invented the revolver |
| Samuel Morse 1837-1938 | invents telegraph and Morse Code |
| Albert Noble-1866 | invented dynamite |
| Alexander Graham Bell-1876 | patents the telephone |
| The Wright brothers-1903 | invent the first gas-powered airplane |
| Albert Einstein-1905 | publishes the theory of relativity: E=mc2 |
| Henry Ford-1914 | introduces assembly line and begins building the first American Cars |
| Alexander Fleming-1928 | discovers penicillin |
| Vannevar Bush-1930 | invents the analog computer |
| Peter Goldmark-1940 | invents color tv |
| John Deere | invented the plow |
| Joseph Glidden | invented barbed wire |