- Boone Dairy, Inc.1
- Cairo Meal & Cake Co.1
- Certified Magnesia Co., Inc.1
- Charles L. Huisking & Co., Inc.1
- Clifford R. Farnsworth, trading as Clearwater Creamery Co.1
- Clifford V. Haver, Louis A. Merillat, Mrs. Myrtle Mary Haver, and William Earl Cahill, trading as the Haver-Glover Laboratories, a business trust existing under the laws1
- Colorado Packing Plant1
- Commander-Larabee Milling Co.1
- Commander-Larabee Milling Co., trading as the Larabee Flour Mills Co.1
- Commonwealth Ice & Storage Co.1
- Cudahy Packing Company1
- D. H. Jordan1
- David M. Leff, trading as the Merit Laboratories Co.1
- Dominick Schiro, trading as D. Schiro1
- Dr. Royal Lee, trading as Vitamin Products Co.1
- Eli Lilly & Co.1
- Elmer Candy Co., Inc.1
- Foote Bros. & Co.1
- Fred R. Lossoe, trading as the Pixine Co.1
- G. A. Williams1