Image: USPTO Telephone Patent No. 174465

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Description: An image of the master telephone patent awarded to Alexander Graham Bell. The patent was arguably the most valuable every awarded in history.
Title: USPTO Telephone Patent No. 174465
Credit: Image provided from this historical article: http://www.corp.att.com/history/inventing.html
Author: U.S.P.T.O.
Permission: This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

Image usage

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