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Aeronautics and Engineering: Patents

What Is a Patent?

"patent is a limited duration property right relating to an invention, granted by the United States Patent and Trademark Office in exchange for public disclosure of the invention."

Classification Codes

"Patent classification is a system for organizing all U.S. patent documents and other technical documents into specific technology groupings based on common subject matter."

On January 1, 2013, the USPTO moved from using the United States Patent Classification (USPC) system to the Cooperative Patent Classification (CPC) system, a jointly developed system with the European Patent Office (EPO).

Patent classification code example

Patent Search Strategies

  • Patent number, application number or publication number search
  • Keywords and synonyms search
  • Classification code search
  • Combination of keywords and classification code search
  • Citing and cited patent citations

Key Patent Databases

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European Patent Office logo


Google Patents logo

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Patent Lens logo

Databases that Include Chemistry-related Patents