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PATENTSCOPE is a global patent database and search system developed and maintained by the World Intellectual Property Organization. It provides free and open access to a vast collection of international patent documents, including patent applications , granted patents, and related technical information.
Wikipedia entry for Google Patents.Google Patents is a search engine from Google that indexes patents and patent applications from the United States Patent and Trademark Office.
The first US land patent was issued on March 4, 1788, to John Martin. [4] That patent reserves to the United States one third of all gold, silver, lead and copper within the claimed land. A land patent for a 39.44-acre (15.96 ha) land parcel in present-day Monroe County, Ohio, and within the Seven Ranges land tract.
The four main advantages of The Lens compared to the leading commercial scholarly databases (e.g. Web of Science and Scopus) are: The Lens is available for anyone with an internet access, and it is free, while commercial databases require quite expensive subscription fees, and in practice they are accessible only to a small number of people affiliated with major research or educational ...
The X generally appears at the end of the numbers hand-written on full-page patent images; however, in patent collections and for search purposes, the X is considered to be the patent type – analogous to the "D" of design patents – and appears at the beginning of the number. The X distinguishes the patents from those issued after the fire ...
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