- Dr. Salsbury's Laboratories, a corporation1
- Dutton Co.1
- Ernest E. Johnson, trading as the Ernest E. Johnson Co., Minneapolis, Minn.1
- Esscolloid Company, Inc.1
- Ethel G. Jeffery, trading as the Mar-Dor Laboratories, Minneapolis, Minn.1
- Fairyfoot Products Co.1
- Frank E. Moore and L. Virginia Moore, individuals trading as copartners under the firm name Hilltop Farm Feed Co., at Minneapolis, Minn.1
- Fred H. Moore, trading as the Hilltop Laboratories and the Hilltop Specialities Co., Minneapolis, Minn.1
- Fred J. Kwako, trading as Kwako Drugs, at Pelican Rapids, Minn.1
- Freshman Vitamin Co.1
- George Foster, Inc., St. Paul, Minn., and George Foster, president of the corporation1
- Ger-Mo-Kill Chemical Co.1
- Gorton Pew Fisheries Co., Gloucester, Mass.1
- Hilltop Farm Feed Co., Minneapolis, Minn., Frank B. Moore, and Fred H. Moore1
- Hilltop Farm Feed Co., a corporation, Minneapolis, Minn., and Frank E. Moore, president and treasurer of the corporation.1
- J. R. Watkins Co., a corporation, Winona, Minn.1
- Jersee Co., Inc., doing business as the Security Food Co. at Minneapolis, Minn., and Fred J. McCann, president of Jersee Co., Inc.1
- John Oster Manufacturing Co.1
- Joseph C. Winslow and Stephen R. Winslow, trading as the Mutual Products Co., Minneapolis, Minn.1
- Joseph Pogoriler, trading as the Farmers Veterinary Supply Co., St. Paul, Minn.1