Publication number or publication date

The publication number is the number assigned to a patent application on publication. This number is different from the application number, which is assigned when the patent application is filed. The publication date is the date on which the application was published.

Examples

Publication number: EP811545

Publication number: EP1023455

Publication number: WO9504154

Publication number: WO9912805

Publication date: 19980826 - Retrieves patent applications published on 26/8/1998

Publication date: 199808 - Retrieves patent applications published during August 1998

Publication date: 1998 - Retrieves patent applications published during 1998

Note: The Boolean operator OR is used implicitly in this field. For example, EP1 EP2 translates to EP1 OR EP2.