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Q23. How Internal Priority is Claimed

Q23. How Internal Priority is Claimed
 Is it possible to file a Japanese application (patent or utility model) which claims the priority based on an earlier filed Japanese application (patent or utility model) within the priority year (so-called internal priority period) allowing inclusion of earlier related invention made within the priority year?

A23. Yes, it is possible.
 The internal priority system provides an applicant of a Japanese application with the same benefit as enjoyed by those of Paris Convention applications.
 A later filed application claiming an internal priority based on an earlier filed application can protect a fundamental invention as well as its improvements or peripheral inventions. In this case, the invention of the earlier Japanese application is combined with the later filed application as a single application and the earlier filed application is deemed withdrawn after a lapse of 1 year and 3 months (15 months) from the priority date (the filing date of the earlier filed application).