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| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
| Sprague, Frank Julian |
| PRONUNCIATION: |  spr g |
| DATES: | 1857–1934 |
| American engineer and inventor. He developed the first electric trolley system (1887) and made advances in electric elevator design. | |
| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. | |
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