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Canadian Patents Database

Boolean Search Example #1

This example finds, by list of fifty, the patents that were issued between October 1, 1989, and December 31, 1999, and contain "controller" in the Title field and "Smith" in the Owner field.
Search For:
Date Search (Optional)
To restrict your search to a specific date range, you must select a date field below. For the date search coverage, see completeness of date fields.