Evaluating Entrepreneurial Technologies

Derwent Innovations Index facilitates rapid, precise patent searching, letting you conduct patent and citation searches of inventions in chemical, electrical, electronic, and mechanical engineering.
This resource merges the value-added patent information from Derwent World Patents Index with the patent citation information from Derwent Patent Citation Index. You can use additional descriptive information and coding to quickly grasp a patent's significance and its relationship to other patents. Reduce duplication of R&D; track competitors' activities; detect and avoid patent infringement; identify potential gaps in the marketplace and possible licensing opportunities.

Google Patents allows searching and reading the full text of patents from around the world. Additionally technical papers and books, are organized and labeled automatically. Automatically searches for prior art, all in one place. Includes results, with images, PDFs and citations. Covers patents from United States, Europe, Japan, China, South Korea, WIPO, Russia, Germany, The United Kingdom, Canada, etc.

Official patent database for US. Limited search options for 1790-1975. Searches for 1976 to present provide full text. Patent information is public domain and free.