Google Patent Search
Google this week unveiled Patent Search, its latest addition to the Google “search product” line.
Google Patent Search brings a whole lot of Google relevance searching goodness to the patent world, all the while expanding the universe of patents fully searchable for free. While the U.S. Patent and Trademark Office only offers keyword searching of full text patents back to 1976, Google has used its Google Books technology to scan the text and images of every patent from 1790 to mid-2006.
Google Patent’s advanced search provides easy templates for searching by patent number, title, inventor, assignee, classification, issue date or filing date. Results from both the basic and advanced patent search are ranked according to relevance to the search terms, just like the standard Google web search.
Individual patents are hosted by Google. Each patent has its own Google page, showing the first page of the patent, drawings, claims, citations to other patents, and patents referencing this patent – all with links to the source documents. It also provides a handy “search within this patent” box for quick narrowing of results. Here’s how Google explains it all.
There is no easy way to print patents from Google patents, but the free pat2pdf service is a fine way to print or download whole patents in PDF (something you can’t do at the U.S. PTO). Firefox user? Try this nifty script which adds a link to pat2pdf to any Google Patent result. Invent Blog points to the many other patent downloading options.
Does this mean you need never again search using the U.S. PTO or private patent databases? Of course not – Google provides a great tool, but there are real limitation to its character recognition, its relevance ranking, and to its true advanced search capabilities.
Read the wise words of Nancy Spitzer, Patents and Technical Reports Librarian at UW-Madison’s Wendt Library, via WisBlawg
Patent librarians across the country are busily analyzing this new member of the Google family and it looks promising. There’s much excitement because this is the first time that keyword searching of all US patents from 1790 to (almost) the present are available free on the Internet! (The US PTO Patent Full Text Database only allows keyword searching back to 1976 and Espacenet keyword in abstract back to 1920).
Google says: “We don’t currently include patent applications, international patents, or U.S. patents issued over the last few months, but we look forward to expanding our coverage in the future.”
Also, be aware of many glitches due to faulty OCR character recognition in older patents. “Electric EEEE CHIICFTE” was found to actually be “Electric cash register.”
Please keep in mind that more precise, comprehensive, “advanced” patent searching is still going to require using the US PTO database and other resources.
Still, Google Patent Search provides easy access to the full-text of patents not previously available to the researcher for free, along with the Google search engine and innovative linking and presentation. One more piece of the shrinking ‘invisible web’ now out in the open.
Sources: WisBlawg, Invent Blog, About Google Patent Search