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Dates:
1963 to present
Description:

The Derwent Innovations Index indexes patents of chemical, electrical and mechanical inventions from 40 patent-issuing authorities worldwide.  Users may seaerch by topic, inventor, patent assignee, patent number, classification codes, as well as searching by cited patents, and by chemical compounds.  Patent titles and abstracts are enhanced by Derwent patent expherts for increased clarity and better topic searching.

Materials Indexed: Government Documents, Patents & Trademarks Database Type: Index Interface Language: English Materials Language: English Subject: Biochemistry, Bioengineering, Biotechnology, Business, Chemical Engineering, Chemistry, Computer Science & Engineering, Economics, Electrical Engineering, Materials Science & Engineering, Mechanical Engineering, Nanotechnology, Patents, Technology Broad Category: Engineering, Government Information, Sciences