Pct the international patent system the patent cooperation treaty pct assists applicants in seeking patent protection internationally for their inventions . Patent cooperation treaty done at washington on june 19 1970 amended on september 28 1979 modified on february 3 1984 and on october 3 2001. The patent cooperation treaty pct is an international patent law treaty concluded in 1970 it provides a unified procedure for filing patent applications to . He patent cooperation treaty pct is an international treaty with more than 150 contracting states the pct makes it possible to seek patent protection for an . The patent cooperation treaty pct enables the us applicant to file one application an international application in a standardized format in
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