Help: Searching Patent Document Numbers

If you know the patent document number use the Patent Document Number Search.

The Canadian Patents Database uses a maximum of 7 numeric digits for all patent document numbers. They can be entered with or without leading zeros, and they should not contain commas.

Examples:

• 217453: Searches for patent document number 217453.
• 0217453: Searches for patent document number 217453.
• 2,217,453: Searches for patent document number 2217453.