Necessity is the mother of invention. The father is unknown.
The following patent was issued by the US Patent and Trademark Office on December 30, 1969.
patent#: USview the full patent | comments (1) 1311-2
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james | Dec 3, 2007 3:03 AM
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and was wondering if you have seen http://www.FreePatentsOnline.com ? This site allows free patent searching, PDF downloading, annoting documents and sharing them between users, free alerts, and more. I thought the link might be a good resource to add to your site.
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