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  2. Search for patents | USPTO - United States Patent and Trademark Office

  3. Patents | USPTO - United States Patent and Trademark Office

  4. United States Patent and Trademark Office - Wikipedia

  5. U.S. Patent and Trademark Office | U.S. Department of Commerce

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  7. Patent Public Search | USPTO - United States Patent and Trademark Office

  8. U.S. Patent and Trademark Office (USPTO) | USAGov

  9. Patent Center - United States Patent and Trademark Office

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