The land document is in my grandpa's name and he was passed away in 1960. At that time, My grandpa had two sons (son1, Son 2) and three daughters. After few years, Son 1 (Elder one) also passed away. After that, Son 1's legal heirs ( Wife and two of his sons) have given the release deed ( Properly Registered) to Son 1 but without mentioning any survey number since it was not partioned at that time. Now, Can Son1 get full rights on his father's property ?