File:Woodward light bulb.JPG

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Summary

DescriptionWoodward light bulb.JPG	English: Figure 3 from US patent 181,613, "Improvement in Electric Lights", by Henry Woodward
Date	1875 (published 1876)
Source	https://en.wikipedia.org/wiki/File:Woodward_light_bulb.JPG
Author	Henry Woodward

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Public domain	This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.	United States
	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.