Clark Mills Kinney, 69, a business owner and inventor, died July 4 at Whitehall Creek near St. Margarets. A spokeswoman for the Maryland medical examiner's office said the cause of death is under investigation.

Mr. Kinney was found in the creek, downstream from where his boat was docked at Whitehall Marina, according to John Surrick of the Natural Resources Police, which listed the preliminary cause of death as drowning.

Mr. Kinney was born in Washington and lived in Annapolis. He founded Wire Conveyor Belts Inc. of Easton, Md., in 1963 and started Multi-Tech Inc. three years later. The companies provided special tubing to insulate electrical wiring that Mr. Kinney developed. He served as president of both companies before retiring in 1988.

He graduated from the U.S. Naval Academy in 1949 and began his career as an engineer with Cambridge Wire Cloth of Cambridge, Md., in the 1950s. He later joined Stone Industrial of College Park.

He was a member of Washington National Cathedral.

His marriage to Joan Kramm ended in divorce. Survivors include two sons, Douglas S., of Arnold, and D. Brooke, of Greenbelt; two daughters, Blake Brandon of Natural Bridge, Va., and Joie Kinney of Washington; a brother, Jerome Kinney, and a sister, Barbara deFranceaux, both of Bethesda; and five grandchildren. PATRICK HENRY McGUIRE JR. Community Relations Specialist

Patrick Henry McGuire Jr., 87, a community relations specialist in private industry and government, died July 10 at Suburban Hospital after surgery for an abdominal obstruction.

Mr. McGuire was born in Homestead, Pa. He attended St. Francis College and graduated from the University of Pittsburgh.

As a young man, he was a tournament tennis player, and he continued to play tennis until 1988, when knee replacement surgery and arthritis forced him to quit.

During World War II, Mr. McGuire was a manufacturing expediter with Kaiser Steel Co. in Pittsburgh. From 1946 until 1961, he was manager of community relations for Pittsburgh Plate Glass Co. in western Pennsylvania.

He moved to the Washington area in 1961 to join the Department of Commerce as a community relations specialist. Later, he was an insurance underwriter for Overseas Private Investment Corp. He retired in 1977.

Mr. McGuire was a member of St. Bartholomew's Catholic Church and Edgemoor Tennis Club in Bethesda.

In 1980, he moved to Delray Beach, Fla. He suffered a stroke there in March and had returned to the Washington area when he was hospitalized.

His wife of 57 years, Doris Evans McGuire, died in March; a daughter, Susan McGuire, died in 1942.

Survivors include two sons, Patrick H. McGuire III and Michael E. McGuire, both of Bethesda, and five grandchildren. HENRY J. HOLMES REA Manager

Henry J. Holmes, 75, a retired manager with the Rural Electrification Administration, died of cancer July 12 at Harborside Nursing Home in Rockledge, Fla.

Mr. Holmes was born in Philadelphia.

He served in the Army during World War II. After the war, he settled in the Washington area and graduated from American University.

He retired from REA in 1980. In 1982, he moved from Hyattsville to Cocoa, Fla.

His wife, Kate Holmes, died in 1989.

Survivors include his companion, Winnie Wandell of Cocoa; seven children, Joseph Holmes of Jessup, Jerome Holmes of Laurel, James Holmes of Gaithersburg, John Holmes of Rockhill, S.C., Jeffrey Holmes of Stoneville, N.C., and Judith Beither and Jeanne Hagan, both of Silver Spring; two brothers, Edward Holmes of Marlton, N.J., and Thomas Holmes of Mapleshade, N.J.; and 12 grandchildren. EMILY WINIFRED ROBERTS Fairfax Teacher

Emily Winifred Roberts, 85, former head of the social studies department at J.E.B. Stuart High School in Falls Church, died of congestive heart failure June 28 at Fairfax Hospital.

Ms. Roberts joined the faculty at J.E.B. Stuart when the school opened in 1959, retiring there in 1975 after 35 years in the Fairfax school system. Earlier, she taught social studies at Falls Church High School.

She taught school in Prince George's County for two years before joining the Fairfax school system.

Ms. Roberts, of Falls Church, was born in Morgantown, W.Va. She graduated from West Virginia University, where she also received a master's degree in education.

She was a member of Women of St. James at St. James Catholic Church in Falls Church.

Her companion, Nelle Shughrou, died in 1983. GERTRUDE TRUDY' ORENSTEIN Secretary

Gertrude "Trudy" Orenstein, 82, a retired Department of Agriculture secretary, died of respiratory failure and pneumonia July 11 at her home in Silver Spring.

Mrs. Orenstein was born in Charleston, W.Va. In the late 1930s, she moved to the Washington area and began her career at the Agriculture Department, where she retired in 1978.

She was a mah-jongg player.

Her husband, David "Jim" Orenstein, died in 1988.

Survivors include a daughter, Nancy Ava Miller of Edgewood, N.M.; two grandchildren; and a great-grandchild. ROBERT WILSON HEFFRON GPO Supervisor

Robert Wilson Heffron, 76, a former member of the Cheverly Town Council who was a retired supervisor with the Government Printing Office, died of cancer July 9 at Sibley Memorial Hospital. A resident of Bowie, he had lived in the Washington area since 1948.

Mr. Heffron was a native of Charleston, S.C., where he was a star pitcher in the local baseball league. He served in the Navy during World War II.

He began at the Government Printing Office as a printer and retired in 1979 after 31 years. He served on the Town Council from 1968 to 1984 and from 1988 to 1990.

Mr. Heffron was a golfer, a former lightweight boxer and a member of the American Legion, Marlboro Country Club, Knights of Columbus and St. Edward's Catholic Church in Bowie. His wife of 58 years, Callie M. Heffron, died in January. Survivors include three children, Jean Heffron Royal of Warren, N.J., Joan Heffron Moosally of Oakton and Robert W. Heffron Jr. of Bowie, and four grandchildren.