Searching the Identifying Codes Field

Enter Identifying Codes to search the following fields within a record.

  • Accession Number
  • ISSN
  • ISBN
  • Patent Number  (for records added to database from 1986 to present)
  • Patent Class  (for records added to database from 1986 to present)
  • Patent Date Granted

Enter one or more codes connected with search operators (AND, OR, NOT). Enter complete codes or partial codes using wildcards (* $ ?).


Left- and Right-hand Truncation

Both left- and right-hand truncation are allowed when using wildcards (* $ ?) when searching for Identifying Codes. You must enter at least one characters after a wildcard when used at the beginning of a word.


Identifying Codes Search Examples

  • PREV200300465955 finds this record with this accession number.

  • *8891* finds all records that contains these four number anywhere in the accession number.

  • 0015-6639 finds records that have this ISSN identifier.

  • *32-7* finds all records that that contain 32-7 anywhere in the ISSN identifier, such as 0032-745X and 0532-7601.

  • 2-7380* finds records that begin with this ISBN identifier. For example, 2-7380-1000-8, 2-7380-0810-0, 2-7380-0716-3, etc.

  • US 5889169 finds this patent record.

  • US 6636757 OR US 6635071 finds both these patent records.

  • 435-107 finds all U.S. patent records that fall within this patent class.

  • September 09, 2003 finds all U.S. patent records that were granted on this particular date.

Note: When entering an ISBN, we recomment that you always enter an asterisk (*) wildcard following the last digit. Many ISBNs have an alphbetic character or a word following the last digit. For example, 2-7380-1018-0 (paper). The system cannot find this record if you only enter 2-7380-1018-0. An error message is returned indicating that the record cannot be found.


About the ISSN Identifier

The International Standard Serial Number is a unique eight-digit number that identifies periodical publications such as journals and electronic publications.

The format is four numbers, a hyphen (-), three numbers, and then a check character that may be a number or an X. Example: 0015-6639


About the ISBN Identifier

The International Standard Book Number is a unique machine-readable identifier that marks a book unmistakably.

The format is a 10-digit number that contains 3 hyphens (-). The last digit is a check character, which may be a number or an X. The position of the hyphens can vary for each ISBN identifier. Example: 2-7380-1000-8