- Acme Packing Co., Apalachicola, Fla.1
- Aeolian Importing Corp1
- Albert & Gerber, New York, N. Y.1
- Albert H. Clark, trading as the Clark Medicine Co.1
- Albert Pace, of Pace & Sons1
- Albert W. Sisk & Son, Preston, Md.1
- Alfred Karlson1
- Alice E. Tasker1
- Allen Bros. Canning Co.1
- Alonzo O. Bliss Co., Washington, D. C.1
- Alpha Importing Co., New York, N. Y.2
- American Apothecaries Co.1
- American Fruit Growers1
- American Lanolin Corporation1
- American Oxidaze Co.1
- American Oyster Co., Providence, R. I.4
- American Pharmaceutical Co.1
- American Pharmaceutical Co., Inc.1
- American Solvents & Chemical Corp5
- Ampere Products Co.1