Diapositiva 1...Patent It Yourself: Your Step-by-Step Guide to Filing at the U.S. by David pressman...

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https://worldwide.espacenet.com/ https://patentscope.wipo.int/search/

en/search.jsfhttps://www.uspto.gov/

patents-application-process/search-patents

http://www.pat2pdf.org/ (en pdf)

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