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Continuing patent application
Under United States patent law, a continuing patent application is a patent application that follows, and claims priority to, an earlier-filed patent application.
A continuing patent application may be one of three types: a continuation, divisional, or continuation-in-part. Although continuation and continuation-in-part applications are generally available in the U.S. only, divisional patent applications are also available in other countries, as such availability is required under Article 4G of the Paris Convention.
==Early history==
From 1838 to 1861, inventors could file patent applications on improvements to their inventions. These were published as "additional improvement patents" and were given numbers preceded by "A.I.". About 300 of these patents were issued.〔(M.P.E.P. 901.04 U.S. Patents Prior Art, Classification, and Search )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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