Important Electrical Engineering 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)

esp@cenet - European Patent Office
Also Known as: espacenet
Full text of EP, WO and other patents back to the 1970's (Also contains links to individual European country patent databases) ...   [more]
Unrestricted Access
Supplemental URLs
    Esp@cenet Help
    Esp@cenet Assistant - tutorial
    European Patent Classification
    International Patent Classification (IPC) 8
    Glossary

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