How many OA will there be in general patents?

There are "initial OA" and "final OA" in Korean patent application process, but an application may contain multiple initial OA. Upon receipt of the initial OA, if the applicant makes data correction, the review committee may reject the original technology (previous technology) found before and then issue the final OA; If the examiner needs new and original technology to reject the case, the process is still called initial OA. Finally, the purpose of OA is to shorten the audit processing time.