What languages does the European Patent Office (EPO) accept for international applications?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-27 10 Rules 5 Related FAQs This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice. The European Patent Office (EPO) accepts international applications in three languages: English French German According to MPEP 1840.01 , “The European Patent Office will act as an International Searching Authority for international applications filed in the U.S. Receiving Office if the European Patent Office is competent to search the international application and the application is filed in English, French or German.” Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse USPTO Acts as International Searching Authority for PCT Applications MPEP 1840 USPTO as International Searching Authority for PCT Applications MPEP 1840 Permitted United States as International Searching Authority Requirement MPEP 1840 PTO Can Act as International Searching Authority and Examining Authority MPEP 1840 Required Functions of International Searching Authority MPEP 1840 Requirement for International Search Reports and Written Opinions MPEP 1840 Steps for International Applications at ISA MPEP 1840 Applicant Must Choose International Searching Authority on Filing MPEP 1840 Required Search Copy Transmitted by Receiving Office to International Searching Authority MPEP 1840 Choice of International Searching Authority for PCT Filing MPEP 1801 Prohibited Other Related FAQs 5 FAQs Collapse How does the EPO determine its competence to search international applications? What is the role of the European Patent Office as an International Searching Authority? Where can I find additional information about the EPO as an International Searching Authority? Have there been any modifications to the arrangement with the EPO as an International Searching Authority? When did the EPO become available as an In...