- Olympus Corporation1
- Park Pharmacy, Rutledge and Fishburne St., Charleston, SC1
- Parke, Davis & Co., Detroit & New York1
- Parke, Davis & Co., Detroit, Michigan1
- Patent B&AB1
- Pelton & Crane1
- Pelton Detroit, U.S.A.1
- Pilling & Sons, Philadelphia1
- Pilling, Philadelphia1
- Pillling Company, Philadelphia1
- Powers and Anderson, Inc., Richmond, Virginia1
- R.A. Fischer & Co., Glendale, California1
- Reinhardt, Charleston, South Carolina1
- Requa Mfg. Co., Inc., Brooklyn, New York1
- Ritter Company1
- Ritter Company, Rochester, New York1
- Roche Electric Machine Company, Grand Rapids, Michigan1
- Roper Hospital Training School for Nurses1
- Rosenthal Optical Company, Charleston, South Carolina1
- Salhi-Adams1