Complex sentence: In 1977 Curtis Pitts sold his interests in the Pitts Special to Doyle Child who later sold the rights in 1981 to Frank Christenson, who continued production at the Afton plant under the guise of Christen Industries.
Split into simpler sentences: In 1977 Curtis Pitts sold his interests in the Pitts Special to Doyle Child. Child later sold the rights in 1981 to Frank Christenson, who continued production at the Afton plant under the guise of Christen Industries.