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The Telephone and Its Several Inventors: A History

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The Telephone and Its Several Inventors: A History - Coe, Lewis
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On March 7, 1876, the U.S. Patent Office issued to a young inventor named Alexander Graham Bell what is arguably the most valuable patent ever: entitled ""improvements in telegraphy,"" in truth it secured for Bell the basic principles involved in a telephone. On the same day that Bell filed his patent application, a caveat (a preliminary patent document) was filed by Elisha Gray. This coincidence sparked the first of many debates over whether Bell was the true inventor of the telephone. In the early 1860s Johann Phillipp ...

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The Telephone and Its Several Inventors: A History 2006, McFarland and Company, Inc., Jefferson

ISBN-13: 9780786426096

Trade paperback

The Telephone and Its Several Inventors: A History 1995, McFarland & Company, Jefferson, NC

ISBN-13: 9780786401383

Hardcover