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sperry, elmer ambrose

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Sper·ry   (spěr'ē)   
American engineer and inventor of numerous electrical devices, including the gyrocompass, a nonmagnetic navigational aid (1910).
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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