Charles S. Leopold, American engineer. Recipient F. Paul Anderson medal, American Society Heating and Air Conditioning Engineers, 1955, Frank P. Brown award, Franklin Institute. Served as ensign United States Navy Reserve, World War I.; Fellow American Society Heating and Air Conditioning Engineers, Royal Society Arts, American Society Refrigerating Engineers (president 1946); member Franklin Institute, Sigma Xi, Eta Kappa Nu.; Club: Engineers.
- Established consulting engineering office under own name, Philadelphia, 1922. Projects include: air conditioning design United States Capitol and (old) House Office Building, 1936, air conditioning and electric design Pentagon Building, 1942, air conditioning design, Madison Square Garden. New York Stock Exchange, Fidelity-Philadelphia Trust Building, others.