The family settlement (partition) the bond is binding evidence.even if unregistered if signed by all legal heirs interested in property.
Based on the family.settlement bond you can file for.mutuation that is transfer of title of property in you.name by giving application along with the family settlement death certificate.of.father grand mother your surviour certificate and other ID proofs. Also you need a noc from.your.sister as she will also have right in property if your.father expired after 2005.
If the mutuation is rejected than you.can file.a.declaration suit in the civil court for.declaring title of property in your favour by submitting requisite documents and family.settlement bond.