- Fresca., Co.1
- Gold Seal Products Co.1
- Gowan Chemical Co.1
- H. Dale Kuhn Laboratory1
- H. L. Green Co. ; P. E. Devine1
- Hallock-Denton Co.1
- Harry C. Campbell, a member of a copartnership trading as the Dairy Laboratories, Philadelphia, Pa.,1
- Hayward Remedy Co., Inc.1
- Husband's Magnesia Co., Inc.1
- J. G. McElvie1
- James Good, Inc.1
- John A. Salter, trading as the Vicksburg Chemical Co.1
- John G. Hutchison, Jr., trading with another at the time of the shipments in question as a partnership under the name of the Hutchison Medicine Co.1
- John L. O Bannon1
- John Miller1
- Kalerd Laboratories Co., Inc.1
- L. Wilzin1
- Lander Co.1
- Lester Tilton operating as Tilton Laboratories, from Clinton, Iowa1
- Liebenthal Bros. Co.1