Dorothy Ross Dysart Fellers, 80, a longtime Washington resident and widow of retired Brig. Gen. Bonner Fellers, died Saturday at Walter Reed Army Medical Center. She had cancer.

After her marriage in 1925, she accompanied her husband to military posts around the world, including the Philippine Islands, where he served as a military aide to the Philippine president in the 1930s. Gen. Fellers, who also served as military secretary and director of psychological warfare for Gen. Douglas MacArthur during World War II, died in 1973.

A native of St. Louis, Mrs. Fellers moved with her family to Ohio in 1914. She graduated from the University of Cincinnati and the Cincinnati Kindergarten Training School. u

The daughter of Birney Dysart, the inventor of an automatic adding machine totaling device, she and other family members received more than $340,000 from Remington Rand Inc. in 1951, to settle a widely publicized lawsuit the family had filed seeking compensation for the invention.

Mrs. Fellers maintained residences here and in Danville, Ill. She was an artist and pianist and a member of the Society of Friends, the Daughters of the American Revolution and the Philippine-American Woman's Club.

She received an award from the governor of Virginia in recognition of her dedication and contributions to the MacArthur Memorial Foundation Museum.

Survivors include a daughter Nancy Fellers Finch of San Diego; a brother, Samuel Clayton Dysart of Cuernavaca, Mexico; and four granddaughters.

The family suggests that expressions of sympathy be in the form of contributions to The Gideons Internation in Bethesda.