John B. Duvall

John B. Duvall, 94, a longtime employee of the old Chesapeake and Potomac Telephone Co., died May 22 of
complications from prostate cancer at Montgomery General Hospital. He lived in Burtonsville.

Mr. Duvall worked for C&P for more than 35 years. He started on local switching stations and then advanced
to the engineering department. During the administration of President Lyndon B. Johnson, he worked on the
design and installation of the White House switchboard. He also engineered secure communication systems
intended for use by the president and military in times of crisis. He retired in 1975.

A native Washingtonian, Mr. Duvall graduated from McKinley
Technical High School in 1933 and was not
drafted during World War II because his work in telecommunications was considered an essential service.

He was a member of the Telephone Pioneers of America, built a television from a kit and later in life was an
active user of the Web.

Survivors include his wife of 64 years, Barbara A. Duvall of Burtonsville; three children, John E. Duvall of
Burtonsville, James B. Duvall of Edgewater and Susan K. Viqueira of Boyds; and five grandchildren.

-- Patricia Sullivan