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Alien Patents
I.P. Guide: International Patent Information at NYPL
I.P. Guide: Patents and Trademarks at NYPL
International Patent Information Guide
Inventors Curriculum Guide
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Patent Applications Published by the U.S. Alien Property Custodian (Alien Patents)
United States Patent Information Guide
US Patent Resources: Plant Patent Color Images, November 26, 2013 - August 25, 2015
US Patent Resources: Plant Patents Color Images, January 3, 2017 --
US Patent Resources: Plant Patents Color Images, September 1, 2015 -- December 27, 2016
US Patents: Index to Plant Patent Color Images