In India, an application may be filed in one of the four patent offices. The head office is located in Kolkata and with the other three branch offices in Delhi, Mumbai, Chennai respectively. The branches deal with the patent applications originating within their respective territorial jurisdiction. AN application can be filed by any Indian national either at the head office or any of the branch offices within the jurisdiction of which the applicant resides or domiciles or has a principal place of business. If the applicant does not belong to either of the two categories of domicile or principal place of business, in that case, the address for service in India may determine the jurisdiction of the appropriate office.

An application for a patent can be filed or a patent can be obtained by an inventor or any other person or company assigned by the inventor. A patent application can be filed either by the inventor alone or jointly, or his/their assignee. If in a case the inventor is deceased, a legal representative/legal heir may apply on behalf of the deceased inventor/his assignee