History
The Washington Diplomatic Conference on the Patent Cooperation Treaty was held in Washington from May 25 to June 19, 1970. The Patent Cooperation Treaty was signed on the last day of the conference on June 19, 1970. The Treaty entered into force on January 24, 1978, initially with 18 contracting states. The first international applications were filed on June 1, 1978. The Treaty was subsequently amended in 1979, and modified in 1984 and 2001.
Read more about this topic: Patent Cooperation Treaty
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