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Main Subject
Enter words that describe the subject of the patent. For different word endings, use the ? wildcard: SUPERCONDUCT? Combine words to get specific information. Example: SUPERCONDUCT? AND (INSULATION OR THERMAL SHOCK)
International Class
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Patent Assignee
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Inventor Name
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Patent or Application Number
Enter the 2-letter country code followed by a space and the number just as it appears in the patent or citation, with all punctuation. For example, patent number CN 2749184 or application number DE 19603241. To display a list of country codes, click Country Code List.
Note about U.S. application numbers: U.S. application numbers are reused every several years. To search by U.S. application number, if you know the application year, select the year from the Application Year drop-down list.
Priority Only (Application Number)
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Record Type
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Patent or Application Year
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