On July 13, 2003, DAVID JOHN KATSANIS, PhD, 76, at his home in Rochester, New York. A Philadelphia native who lived in Maryland for over 25 years. WWII Army veteran. Doctorate from Temple University. Retired from 31 years of civil service as a supervising physicist. Cited for service to the Army, the White House and the Secret Service. Recognized expert in the fields of small arms research and development and suppressive shields. Later chief physicist at Shielding Technologies. Authored patents and publications in the fields of ballistics, lasers, fluid dynamics, and suppressive shielding. An accomplished ice-dancer, skier, and ballroom dancer. Also oil painted, built furniture and an avid gardener and amateur photographer. Predeceased by wife of 44 years, Anna Mataloni. Survived by wife, Carol Seemann; children, Karen Hunold (Massachusetts), Paul, (Virginia), Gary (New York); three grandchildren; brothers, Theodore (Washington), Daniel (West Virginia). A Memorial Service will be held at 2 P.M. on Saturday, July 26th at the Highland Presbyterian Church in Street, Maryland. In lieu of flowers, please make donations to the American Cancer Society.