What types of patents are available?
Google Patents covers the entire collection of issued patents and millions of patent application made available by the USPTO, from patents issued in the 1790s through the present. International patents are not included at this time but may be included in the future.
How many U.S. patents are there?
To date, the USPTO has made available approximately 8 million patents and 3 million patent applications.
How does it work?
Using the same technology that powers Google Book Search, Google has converted the entire image database of U.S. patents into a format that’s easy to search. You can search the full text of U.S. patents from the Google Patents homepage, or visit the Advanced Patents search page to search by criteria like patent number, inventor, and filing date.
How do you rank patents in the search results?
As with Google Web Search, patent results are rated according to their relevance to a given search query. Google uses a number of signals to evaluate how relevant each patent is to a user’s query and determines the results algorithmically.
Prior Art Finder is another search available from Google. The Prior Art Finder scans text for key phrases, combines them into aset of search queries, and displays the results from Google Patents, Google Scholar, Google Books, and the rest of the web. You can enter your text into the text area above, or find prior art for a particular patent application or grant by entering an identifier such as US20120309256 or EP1692064B1.