An application for a patent may be made by any of the following persons either alone or jointly with another True and first inventor True and first inventor’s assignee Legal representative of deceased true and first inventor or his/her assignee. The term “person” as defined in the Patents Act includes Government [Section 2(1)(s)]. Assignee can be a natural person or other than a natural person like registered company, research organization, educational institute, or Government [Section 2 (1)(s)]. Assignee includes assignee of the assignee also (Section 2(1)(ab)). A ‘proof of right’ is required to be submitted by the assignee to establish assignment by the inventors to the assignee. Such proof of right may be submitted either by a prescribed form under the Patents Act executed by the inventors, or by way of an executed deed of assignment. Legal representative means a person who, in law, represents the estate of a deceased person [Section 2 (1)(k) of the Patents Act]. In such a case, the person should file the death certificate along with other appropriate legal instruments as proof of right.