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英文字典中文字典相关资料:


  • U. S. Patent and Trademark Office Records at the National Archives at . . .
    The National Archives at Kansas City provides on-site access to patent records to researchers in our research room Appointments are required to view the materials as they must be retrieved from an off-site storage location
  • Records of the Patent and Trademark office - National Archives
    For the most up-to-date information on National Archives holdings, please visit the National Archives Catalog In the Catalog, you can find descriptions of our holdings and access electronic records and digitized copies of our holdings, where available
  • Google Patents
    Search and read the full text of patents from around the world with Google Patents, and find prior art in our index of non-patent literature
  • Search for patents | USPTO
    Find existing patents, published patent applications, and other published patent documentation
  • Patent Public Search | USPTO
    A powerful, flexible web-based patent search application that improves the overall patent searching process It includes two user selected interfaces that provide enhanced access to prior art
  • Intellectual property: patents of invention - The National Archives
    The National Archives has records of patents of invention for England and Wales dating from between 1449 and October 1852, as well as related records including technical specifications
  • Patents from The National Archives — Public Domain Photos
    The telephone: Alexander Graham Bell's patent for the telephone, which was filed in 1876, included drawings of the device's components, such as the transmitter and receiver, as well as a diagram of the electrical circuit These are just a few examples of famous patent drawings
  • WIPO - Search International and National Patent Collections
    This patent search tool allows you not only to search the PCT database of about 2 million International Applications but also the worldwide patent collections This search facility features: flexible search syntax; automatic word stemming and relevance ranking; as well as graphical results
  • Google Patents Advanced Search
    Search and read the full text of patents from around the world with Google Patents, and find prior art in our index of non-patent literature
  • Patent Searches - Intellectual Property Law: A Beginners Guide . . .
    Allows researchers to search the full text of granted US patents from 1971 to the present, with limited information for US patents dating back to 1790 This site also provides published patent applications from March 2001 to the present





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