Best Information on the 'Net: Business - http://library.sau.edu/bestinfo/Majors/Business/busindex.htm This helpful list covers a wide variety of business subjects.
Best of the Best Business Web Sites - http://www.ala.org/ala/rusa/rusaourassoc/rusasections/brass/brassprotools/bestofthebestbus/bestbestbusiness.htm Business librarians collected this excellent list of business related links.
Google Patent Search - http://www.google.com/patents This part of Google allows searching for information from the U.S. Patent and Trademark Office.
KnowThis.com: Knowledge Source for Marketing - http://www.knowthis.com/ This searchable and browseable resource includes information about marketing, advertising, sales, promotion etc.