Important Energy Patents & Trademarks

Derwent Innovations Index
Search more than 11 million patent records from 40 worldwide patent-issuing authorities. These include the US Patent and Trademark Office, European Patent Office, PCT (WO) applications and the Japanes...   [more]
Supplemental URLs
    Derwent Classification System
    Derwent Manual Coding and Classification Lookup
    Derwent Patent Assignee Codes Lookup
    Kind Codes (application, examined, granted, etc.)
    International Patent Classification (IPC)

Official Gazette of the United States Patent and Trademark Office
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Unrestricted Access
Supplemental URLs
    Patent Official Gazette (most recent 52 issues)
    Trademark Official Gazette (most recent 5 issues)

U.S. Patent and Trademark Office
Also Known as: USPTO
Covers all US patents from 1790 onwards. Download or view high-quality images of the actual pages of the patents, including diagrams and structures from 1790 onwards. Patents from 1976 - present are a...   [more]
Unrestricted Access
Supplemental URLs
    Free PDF download of all pages

United States Patent and Trademark Office Glossary
Also Known as: USPTO
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Unrestricted Access

United States Patent and Trademark Office Manual of Classification
Also Known as: Manual of Patent Classification , USPTO
Patents are classified in the U.S. by a system using a 3 digit class and a subclass to describe every similar grouping of patent art. A single invention may be described by multiple classification co...   [more]
Unrestricted Access