Owen J. Roberts, Allen Calculators v. National Cash Register Company…
“ Intervention of Right. Upon timely application anyone shall be permitted to intervene in an action: (1) When a statute of the United States confers an unconditional right to intervene; or (2) when the representation of the applicant's interest by existing parties is or may be inadequate and the applicant is or may be bound by a judgment in the action; or (3) when the applicant is so situated as to be adversely affected by a distribution or other disposition of property in the custody of the court or of an officer thereof. ”
