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Google Patents includes over 120 million patent publications from 100+ patent offices around the world, as well as many more technical documents and books ... SkiptomaincontentAboutGooglePatentsCoverageNext:SearchingGooglePatentsincludesover120 millionpatentpublications from100+patentofficesaroundtheworld,aswellasmanymoretechnicaldocumentsandbooksindexedinGoogleScholarandGoogleBooks,anddocumentsfromthePriorArtArchive. Patents Wecurrentlyindexfull-textdocumentsfromthefollowingpatentoffices: UnitedStates Europe Japan China SouthKorea WIPO Russia Germany TheUnitedKingdom Canada France Spain Belgium Denmark Finland Luxembourg TheNetherlands Austria Australia Brazil Switzerland Taiwan Youcanseethereal-timenumberofdocuments thatare included fromeachpatentofficebyclickingon"aroundtheworld"onpatents.google.com. Thesetotalsincludeallpatentsandpublishedapplicationsinourindex,butwecannotguaranteecompletecoverage.Ifwe'remissinganything,pleasefilefeedback. Manydocumentshavefull-textdescriptionandclaimsavailable.The"Since..."dateslistedonthestatisticsgraphshowwhen full-textisavailable,butadditionalabstract-onlydocumentsareoftenavailable forearlierdates. Patentswithonly non-English texthavebeenmachine-translatedtoEnglishandindexed,soyoucansearch patentpublicationsusingonlyEnglishkeywords. Non-patentliterature Newideasareoftenpublishedeitheraspatentapplications orinacademicjournals.Ifyouaresearchingforpriorarttoapatentapplication,itiscriticalinmanyfieldstoalsosearchfornon-patentliteraturetogetacomplete viewofthestateoftheart. Tomakepriorartsearchingeasier, GooglePatentsincludesacopyofthetechnicaldocumentsandbooksindexedinGoogleScholarandGoogleBooks.Thesedocumentshavebeenmachine-classifiedusingtheCooperativePatentClassificationschemecommonlyusedinpatentsearchingtomakefindingdocumentseasier. YoucanbrowsethecitationmetricsforthetoppublicationsinGoogleScholarMetrics togetanoverviewofthetypesandsourcesofpapersincluded, andseeGoogleScholarhelpfordetailsonwhatpapers areincluded. ThePriorArtArchiveprojectincludesoldproductmanualsandannouncementsfromcompaniesaroundtheworld.Thesedocumentsarealsoindexedandmachine-classifiedinGooglePatents. Next:SearchingWasthishelpful?Howcanweimproveit?YesNoSubmittrueAboutGooglePatentsOverviewCoverageSearchingSearchresultspageResultviewerPrivacyandSecurityGoogleappsMainmenuSearchHelpCentertrue5016068falsefalse