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Fuel Cells: Patents

Search Strategies

The International Patent Classification (IPC) classifies fuel cells under H01M, which includes batteries for the direct conversion of chemical into electrical energy. Methods relating to the manufacturing of fuel cells are found under H01M8 and its subclasses. Fuel cells installed in vehicles can be found under B60K.

In the U.S. Patent Classification (USPC) system, fuel cells are classified in Class 429: Electrical Current Producing Apparatus, Product, and Process, subclasses 12-45. Fuel cells installed in hybrid electric vehicles are located under Class 903.

Patent Databases

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Espacenet
(more info)
Publication coverage: 1836 - present
Canadian Patents Database (CIPO) Canadian resource
Canadian patent records, 1869 to present; full-text documents, 1920 to present.
U.S. Patent Databases (USPTO)
U.S. patents, 1790 to present and published applications, 2001 to present. Patents prior to 1976 can be retrieved by number, date and classification. TIFF viewer required to view/print patent documents.
PatentScope (WIPO)
International patent applications, 1978 to present.
Patent Lens
AU, EP, US and WO patent documents, 1970s to present.
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Last Updated: 28 January 2010