- Anna Persoglia, Hockessin, Del.1
- Aschenbach & Miller, Inc.1
- Atlantic Food Products Co.1
- Berg Co., Inc.1
- Blue Ribbon Candy Co.1
- Bowers Oyster Co.1
- Bradley Laboratory1
- Brown's Bron-Ki Co. from Lancaster, Pa.1
- Carlton Clifton & Sons1
- Charles L. Heinle Specialty Co.1
- Combination Remedy Co.1
- Consolidated By-Product Co.1
- Coulbourne & Jewett1
- Crescent-Kelvan Co.1
- D'Ormont Laboratories1
- Daland Vitamin Co., Wilmington, Del. The capsules had been repacked1
- Davis Canning Co.1
- De Witt P. Henry Co.1
- Delmarva Poultry Corp., Milford and Frankford, Del.; Eagle Poultry Packers, Inc.,. Frankford, Del.; the Royal Poultry Corp., Frankford, Del.; and David Pack, president of the Delmarva Poultry Corp. and the Royal Poultry Corp., and Harry Landes, president of Eagle Poultry Packers, Inc., and chairman of the board of directors of the Delmarva Poultry Corp. and the Royal Poultry Corp.1
- Dill Co.1