Creator
- Rankin, John C., Jr.1
- Read Holliday & Sons1
- Reading Scientific Company1
- Reimann, M.1
- Revue Générale des Matières Colorantes1
- Reynolds Metals Company1
- Rhoades, C. N.1
- Rich, Elihu, 1819-18751
- Richard Clay and Sons1
- Richards & Co. (New York, N.Y.)1
- Richardson, Elliot L., 1920-19991
- Ridgway, Robert, 1850-19291
- Rieder, Hermann1
- Rohm and Haas Company1
- Roscoe, Henry E. (Henry Enfield), 1833-19152
- Royster, P. H. (Percy Hoke), 1888-19661
- Rumford Chemical Works3
- Rumford Company1
- Runge, F. F. (Friedlieb Ferdinand), 1795-18671
- Russell Brothers1