USPTO patent search - www.uspto.gov/patft/index.html

Global Patent Search - www.PatentSearch.Patentcafe.com

Patent Café - www.patentcafe.com

Intellectual Property Organization - www.ipo.org

IP Frontline - www.ipfrontline.com

World Intellectual Property Organization - www.wipo.org

The eleven most critical mistakes that prevent inventors from gaining the financial value they deserve from their inventions.- www.InventorsReport.com