Can joint owner claim share if ownership not transferred ?

Dear Sir, My Husband's Grand Father is Dead long back. He did two marriages. First Marriages wife (A) and second marriage wife (B) Wife (A)= 5 sons & 3 daughters (Father in law) Wife (B) Dead = 2 daughters 1.my father in law & there 4 brothers is holding a property of his father where he is running a shop from last 20 years but the ownership is still not transferred & the property is still not transferred. 2.when my father in law & there 4 brothers were running shop they owned two more shops & that shops owned by my father in law. kindly advise whether the property belongs to my father in law or all the members will get share in this property.