There are help screens and sample searches for each kind of search. A unique feature is the clickable button linking to similar abstracts. MicroPatent PatentWEB PatentWEB offers free searching of the US Online Gazette and easy browsing of the exemplary drawings. The most recent 4 weeks of US patents can be viewed by US Major Classification for free. Also free is a search of full text of all US patents issued for the current and past week.
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Users have to register and get a free password. The librarians at the Detroit Public Library's Great Lakes Patent and Trademark Center have created this database. There are more then 800 entries of African Americans who were issued a patent for their invention. Patent Cafe's Patent Search Provides links to databases to search for patents. Patent Cafes's International Government Patent Offices P rovides links to Patent Offices all over the world.