约 409,000 个结果
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  1. Patents | USPTO - United States Patent and Trademark Office

  2. United States Patent and Trademark Office

  3. Search for patents | USPTO - United States Patent and Trademark …

  4. Patent Public Search | USPTO

  5. Patent essentials | USPTO

  6. Patent Basics | USPTO

  7. Applying for Patents | USPTO - United States Patent and …

  8. Patent process overview | USPTO

  9. Patent Center | USPTO

  10. Patent Center

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