In an obituary in The Washington Post on Oct. 4 about Frank P. Saponaro, 73, a former member of the U.S. Postal Rate Commission who died Oct. 3, Mr. Saponaro's last name was misspelled and the cause of his death was omitted. He died following a stroke.

Frank P. Soponaro, 73, a member of the U.S. Postal Rate Commission from 1970 to 1977 who was a former officer of consulting and gas line concerns, died Oct. 3 at the Bethesda nursing home in Chevy Chase. He lived in Chevy Chase.

Mr. Soponaro was a native of Boston and 1931 graduate of Harvard University. He came to Washington in 1936 and joined the Rural Electrification Commission, where he spent six years and became head of its rate section. From 1942 to 1950 he was rates staff director with the Federal Power Commission.

He moved to Louisiana and became rates manager with the Texas Eastern Transmission Corp., then returned to Boston in 1953 and became a vice president of Algonquin Gas Transmission Co. He moved back to Washington in 1960 and spent 10 years with H. Zinder and Associates, an international economic and consulting firm. He was its executive vice president when he was named to the Postal Rate Commission.

He was a member of Our Lady of Lourdes Catholic Church in Bethesda, and the Congressional County Club.

Survivors include his wife, Portia, of Chevy Chase; a son, Frank Jr., of Potomac; a daughter, Portia Redford of New York City; two brothers, Joseph, of Hingham, Mass., and Philip, of Natick, Mass.; a sister, Isobel Sinesi of Boston, and two grandchildren.