- Harvey Laboratories, Inc., Philadelphia, Pa.1
- J. R. Watkins Co., a corporation, Winona, Minn.1
- John W. Lippincott, Newark, Ohio1
- Kotalko Sales Co.1
- Louis L. Sherman, M. D., trading as the Layman's Academy of Health at Oakland, Calif.1
- Macu Food Products, a corporation, Chicago, ill.1
- Marvel Products Co., Inc.1
- Merck & Co., Inc.1
- Merck & Co., Inc., Rahway, N. J.1
- Miracle Products, Inc., from Chicago, Ill.1
- National Magnesia Co.1
- New York Hair Co.1
- Nion Corporation, Los Angeles, Calif.1
- Phoenix Preparations1
- Planet Products Co.1
- Readyflask, Inc.1
- Research Laboratories, Inc., Portland, Oreg1
- Rolle Vegetable Juices, Inc.1
- S. B. Penick & Co.1
- Standard Synthetics, Inc., New York, N. Y.1