Basic Patent Searches — Part 2
Searching Application Numbers
Application numbers, like patent numbers, have a consistent Dialog format that permits cross-file searching. We must always use a two-digit country code with the application number.
Formats for searching application numbers are listed in the table below.
| Dialog Format | Format | Description |
|---|---|---|
| AN=CC NNNNNNNN | AN=US 68201 | For countries with a continuing series, enter the two-letter country code, a space, then the one- to eight- digit serial number with no leading zeroes. |
| AN=CC YYNNNNNN AN=CC YYYYNNNNNN |
AN=GB 8331698 AN=GB 198331698 | For countries with an annual series, enter the two-letter country code, a space, then two digits or four digits to represent the year, followed by the one- to six- digit serial number |
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