- Certified Laboratories, Philadelphia, Pa.1
- Crescent-Kelvan Co., an association, Philadelphia, Pa., Jeremiah T. Roach, president, and George Duke Lambert, secretary-treasurer of the company.1
- David Klebanoff, trading under the firm name of Dake Pharmacal Company, Philadelphia, Pa.1
- David M. Leff, trading as the Merit Laboratories Co., Philadelphia, Pa.1
- David Polis, trading as Polis Pharmacy, Philadelphia, Pa.1
- Difco Laboratories, Inc.1
- Drew Corporation1
- Elsie Bleeker1
- Elvita Research Laboratories, Inc.1
- Estro Chemical Co.1
- Garfield and Co.1
- Garrell's Pharmacy, a partnership, Philadelphia, Pa., and Marshall F. Garrell and Frank E. Garrell, partners in the partnership.1
- George F. Hauptman, trading as the Market Drug Company, Philadelphia, Pa.1
- George T. Lambert, David Periera, and George D. Lambert, trading as the Crescent-Kelvan Co., a business trust, Philadelphia, Pa.1
- Germania Tea Co.1
- Gold Leaf Pharmacal Co., from New Rochelle, N. Y.1
- Great Valley Mills1
- Halfdan Hebo1
- Harry Goldstein, trading as Nu Cedar Pharmacy, Philadelphia, Pa.1
- Harry Laken, trading as the Marshall Drug Co., Philadelphia, Pa.1