- Fentone Medicine Co.1
- Frank B. Moran, trading as the Magnetic Ray Co.1
- G. C. Heberling Co.1
- Garfield and Co.1
- Harris Medicine Co.1
- Hubbel Products, Corporation, Boston, Mass.1
- Iowa Master Breeders, Inc.1
- LeLord Kordel and LeLord Kordel Products1
- Lloyd M. Curts and Charles D. Folse, copartners trading as the Curts-Folse Laboratories, Kansas City, Kans.1
- Loeser Laboratory, Inc., New York, N. Y., and Karl B. Rosen, secretary of the corporation1
- Maritime Milling Co.1
- Martin Rudy Estate1
- McCloskey Drug Co., Inc.1
- Noxaboil Laboratories1
- Otto Kalmus, an individual trading as the Sumlak Co., Cincinnati, Ohio1
- Pom-U-Soy Co., Ltd., a partnership, Cincinnati, Ohio1
- S. E. Massengill Co.1
- Schultz, Baujan & Co.1
- Solex Laboratories, Inc., New York, N. Y.1
- Sterling Research Corporation1