- Charles F. Schneider and Dennison W. Schneider, copartners, trading as the Interstate Medical Co.1
- Charles Vernon Rosenberger and Edward J. Belgarde, trading as Independence Produce Co.1
- Chaska Canning Co.1
- Chester B. Brown Co.1
- Clair F. Limbeck, trading as the Iowa Products Co.1
- Clarksville Packing Co.1
- Clay M. Webb Co.1
- Cohen Wholesale Grocery1
- Constable Drug Co., a partnership, Storm Lake, Iowa.1
- Continental Nut Co.1
- Crete Mills1
- D. Kellerman1
- Delos A. Bartell1
- Denver Mud Chemical Co.1
- Diamond Brothers1
- Doud Milling Co.1
- Doud Milling Co., Denison, Iowa, and Herbert L. Fitch, secretary-treasurer of the corporation1
- Douglas Packing Co.1
- Dr. Fenton's Vigortone Co.1
- Dr. Fenton's Vigortone Co., a partnership, Cedar Rapids, Iowa.1