- Harry Clayton House, trading as the Western Natural Foods Co., Seattle, Wash.1
- Henry Perlmuter, trading as the Crystal Drug and Magnesia Co, and as the White-Stone Laboratories, Dorchester, Mass.1
- Herman Achs, trading as the Certified Laboratories, Philadelphia, Pa.1
- Korjena Medicine Co.1
- Kovac Laboratories1
- Koyal Products Co., Chicago, Ill.1
- Lakeside Laboratories, Inc.1
- Lloyd Brothers, Pharmacists, Inc., Cincinnati, Ohio1
- M. K. Schilling1
- McKesson and Bobbins--Van Vleet Division1
- Miller Chemical Co.1
- National Drug Co., a corporation, Philadelphia, Pa.1
- Oran Products1
- Orbolene Co., St. Louis, Mo.1
- Physicians Drug Co.1
- Pinee Chemical Co.1
- Price Compound Company1
- Research Products, Inc.1
- Reuben Seltzer, trading as the Success Chemical Co., Brooklyn, N. Y.1
- S. B. Leonardi and Co., Inc.1