According to our records, this business is located at 8 Constance Dr. in San Rafael (in Marin County), California 94903, the location GPS coordinates are: 37.998676 (latitude), -122.540689 (longitude). C A Duffy is categorized under Fire Alarm Systems and Equipment Testing (SIC code 1731). Known organization owner is Columba Duffy. You can contact the company by phone at (415) 492-9449.