- Frank W. Lavoine, trading as the Lavoine Drug Co., Worcester, Mass.1
- Geo. M. Beringer, Inc.1
- Gibbs Peoples Drug Service Co., Harrisburg, Pa.1
- H. G. Knoll & Co., Inc.1
- Herpicide Co.1
- Hilltop Farm Feed Co., Minneapolis, Minn., Frank B. Moore, and Fred H. Moore1
- Holdfast Truss Co.1
- International Vitamin Corporation1
- J. R. Watkins Co.1
- Kent Drug Co.1
- Kon-Trold Products Corporation1
- Lawrence Laboratories1
- Lurin Co.1
- McCollum Laboratories1
- Medical Products Institute, Inc.1
- Medical Specialty Co.1
- Nature's Minerals Co.1
- Nature's Minerals Food Co.1
- Orrine Co.1
- Owens & Minor Drug Co., Inc., of Richmond, Va.1