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SS Chapter 20 Lesson 3
Inventions
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| A | B |
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| passenger elevator brake | Elisha Otis |
| sleeping car | George Pullman |
| air brake | George Westinghouse |
| automatic engine-oiling machine | Elijah McCoy |
| telephone | Alexander Graham Bell |
| phonograph and light bulb | Thomas Alva Edison |
| mass production | Henry Ford |
| flying machine | Wright brothers |
| Kodak camera | George Eastman |
| transatlantic cable | Cyrus Field |
| shoe-making machine | Jan Matzeliger |
| meatpacking refrigeration | Gustavus Swift |
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