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- Spain extended patent protection to U.S. plant varieties on a reciprocal basis (June).
- Taiwan initialled a bilateral copyright agreement, and submitted legislation which better protects films from unauthorized public performance (July).
- Argentina agreed to modify its pharmaceutical product registration procedures, and to address the issue of patent protection for pharmaceutical products (September).
- Indonesia enacted its first patent law including product protection for pharmaceuticals, effective August 1991 (October).
- Portugal increased penalties for audio piracy (November).
- Italy introduced legislation to prevent computer software piracy (November).
- Saudi Arabia enacted a new copyright law (December).