File:PopSci Nov 1935 pg31.jpg

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Description Article, describing vertical-axis wind turbine.
U.S. patent number:  2005470
Issue date:  Jun 18, 1935
Inventor:  Olof K. Olson, Kansas City, Missouri.
Date
Source

Popular Science Monthly magazine, page 31.
122 pages
Vol. 127, No. 5
ISSN 0161-7370

Published by Bonnier Corporation
Author Popular Science Monthly magazine
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(Reusing this file)

1935 copyright expired; not renewed, based on listings in the Catalog of Copyright Entries, published by the US Copyright Office.

“Popular Science” Magazine – 91 Years Worth of Back Issues In The Public Domain

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This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.

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current01:18, 20 June 2010Thumbnail for version as of 01:18, 20 June 2010870 × 969 (235 KB)Apddraig (talk | contribs){{Information |Description= Article, describing vertical-axis wind turbine. |Source= Popular Science magazine, page 31. |Date= November, 1935 |Author= Popular Science magazine |Permission= 1935 copyright expired; not renewed, based on listings in the Cata

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