Retired Air Force Col. Joseph Daleda, 64, a former patent lawyer and patent examiner here, drowned accidentally Jan. 17 at Port Charlotte, Fla., where he had been living for several years.

Born in Fall River, Mass., he was a graduate of massachusetts Institute of Technology. He came to Washington in the late 1930s to work as an examiner with the U.S. Patent Office, while attending George Washington University.

After serving in the Middle East with the Army Air Forces in World War II, Col. Deleda returned to the Patent Office and George Washington University, where he earned several law degrees.

Col. Daleda became a patent attorney for Texaco in New York in the mid 1950s and retired several years ago.

While living in Upper Montclair, N.J., he was commander of the 9071st Air Reserve Group in New Jersey from the 1950s to the early 1960s. During this period he attended NATO and SHAPE conferences in London, Paris and Wiesbaden.

He is survived by his wife, Harriett, of the home in Port Charlotte; two daughters, Catherine Morrocco, of Pittsburgh, and Frances, of Monmouth Beach, N.J.; a son, John, of Lakeland, Fla., and his mother, Fannie Daleda, and a sister, Ellen McAra, both of Arlington.