Abstract
The loading of the United States Patent and Trademark Office (USPTO) database on the Internet has set off a chain reaction with other patent database publishers. Patent information has never been so accessible, at such low cost, to so many people as now. This new accessibility has spawned a new set of questions about the Internet patent databases, such as, what are their uses, and what are the differences? Librarians who do not specialize in patent searching might have reservations about doing patent searches. This article describe? the different patent databases on the Internet, lists their strengths and weakness, and recommends the best free patent databases.
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