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Patent Models

Patent models were required as part of a patent application for a United States patent until 1880. The Patent Act of 1790 required a miniature model of each invention be made that showed how the invention works. In 1926 the stored patent models were sold as a group by the U.S. Patent Office and individual models are appearing in the marketplace.


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strkey:patent-models
metakey:Advertising , Store Collectibles Price Guide
870,20081
eBay Auctions
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Details
Price
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Pattern or Item
Guitar Zither
Category
Description
U.S. Guitar Zither Company, May 29, 1894
Year Priced
2009

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