An application filed by a patentee after a patent has issued to correct applicant's errors that rendered the patent wholly or partly inoperative due to a defective specification or drawings or which claimed more or less than the applicant had a right to claim. The applicant must provisionally surrender the previously issued patent. Any reissue patent that results will have the same expiration date as the original patent.
A reissue is a version of a model that is a newer, placed on the market some time after the original model. Many times manufacturers will reissue a kit if there seems to be enough demand. In many instances kits have been reissued several times, occasionally with variations in the actual tooling, but more commonly, exactly like the original. Reissued kits are almost always less expensive than originals.
Reissues replace an unexpired patent that is defective in one or more areas, (i.e., the reissue will attempt to correct the original patent).