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Searching the Patent Number Field

Searches the Patent Number(s) field within a patent record.

Enter one or more patent numbers connected with the OR Boolean search operator. You can enter complete patent numbers or partial patent numbers using wildcards (* $ ?).

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Patent Number Formats

Numeric Series Patent Numbers

Format CCNNNNNNNN, where "CC" is the WIPO country code and "N" is the maximum 10-digit serial number.

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Patent Numbers that Include a Year Element

Format CCYYYYNNNNNN, where "CC" is the WIPO country code, "YYYY" is either a two-digit year prior to 2001 or a four-digit year from 2001, and "N" is a eight-digit serial number.

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Japanese Patent Numbers

Special formats are used to distinguish between Japanese documents that are unexamined applications, old law examined patents and new law granted patents. From January 1, 2001, the Japanese Patent Office introduced a new numbering system for patent applications (A documents) based on the Western Year using YYYY format in place of Imperial years.

Unexamined Applications - Kokai (Patent Kind A,W, X, Y, Z)

Format JPEENNNNNN, where "JP" is the WIPO country code, "EE" is a two-digit Japanese Emperor year, and "N" is a maximum six-digit serial number. For example: JP11280599-A

Format JPYYYYNNNNNN, where "JP" is the WIPO country code, "YYYY" is a four-digit Western year (after January 1, 2001), and "N" is a maximum six-digit serial number. For example: JP2001102423-A

Old Law Examined Accepted Patents - Kokoku (Patent Kind B)

Format JPYYNNNNNN, where "JP" is the WIPO country code, "YY" is a two-digit Western year, and "N" is a maximum six-digit serial number. For example: JP96033614-B2

New Law Granted Patents - Toroku (Patent Kind B2)

Format JPNNNNNNN, where "JP" is the WIPO country code and "N" is a maximum seven-digit serial number. For example: JP2839470-B2

Western Year - Japanese Emperor Year Conversion

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Search Examples

• EP87654 finds this specific patent record.

• EP87651* finds every patent record that begins with EP8765. For example, EP876512-A, EP876514-A, EP876516-A, and so on.

• US5723470-A finds this patent record that has a status code of A.

• WO9945164 OR WO9944216 finds both these patent records.