- Blackburn Products Co.1
- Dr. A. W. Chase Medicine Co.1
- E. W. Hall, St. Louis, Mo.1
- Martin Rudy, Lancaster, Pa.1
- McCullough Drug Co.1
- United Laboratories, St. Louis, Mo., December 24, 1919, and January 22, 1920, respectively1
- United Medicine Co.1
- W. B. Wood Mfg. Co.1