Due to the limitation of human mental capabilities, there probably exist in patent application the defects which make the scope of the consequent patents inadequate, influencing the distribution of interests between right owners and the others Reissue in patent law of the United States is not only to provide the postgranted remedy for patent grantee, but also establishes the mechanism of interestbalancing mainly through the recapture doctrine and intervening rights Analysis on reissue will contribute obviously to the correct understanding on interestbalancing as well as the research on, and the operation of, the patent system in our country