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Industrial Patent Activity in the US (United States). (Part 1: Time Series Profile by Company and Country of Origin ; Part 2: Alphabetical Listing by Company).
US (U.S.). National Technical Information Service
出版U.S. Patent and Trademark Office, Office of Technology Assessment & Forecast, 1983
URLhttp://books.google.com.hk/books?id=cWUVYAAACAAJ&hl=&source=gbs_api