- Carnation Company1
- Cayce Historical Museum, South Carolina1
- Charles B. Knox Co., Johnstown, New York1
- Charles B. Knox Gelatine Co., Inc1
- Charles B. Knox Gelatine Co., Inc, Johnstown, New York1
- Charles B. Knox Gelatine Co., Inc, Johnstown, New York;1
- Charles B. Knox Gelatine Co., Inc.1
- Charles B. Knox Gelatine Co., Inc., Johnstown, New York, Montreal, Canada1
- Charles Gulden, Inc.1
- Charleston Museum1
- Charleston County Register Mesne Conveyance1
- Chicago Flexible Shaft Company1
- Chr. Hansen's Laboratory, Inc.;The Junket Folks1
- Coastal Carolina Universitiy1
- Cobb Preserving Co.1
- Collection of Alice Starr Baker1
- Collection of James and Susan Witkowski1
- Collection of Judge and Mrs. James A. Spruill, III, Cheraw1
- College of Pharmacy; Waring Historical Library (MUSC)1
- College of Pharmacy;Waring Historical Library (MUSC)1