Names
- Phillips, R. Stenner1
- Piccirilli Brothers1
- Platt, Charles A (Charles Adams), 1861-19331
- Pope, John Russell, 1874-19371
- Presbrey-Coykendall Co1
- Presbrey-Leland, Inc. (New York, N.Y.)1
- Procházka, Ferdinand1
- Putnam & Cox1
- R. Guastavino Company1
- Renwick, Aspinwall & Owen1
- Renwick, Aspinwall & Tucker1
- Renwick, James, 1818-18951
- Robert Catella & Co1
- Rogers, James Gamble1
- Ruddy, Stephen A1
- Schoen, Eugene1
- Shipman, Ellen, 1869-19501
- Shire, Edward I1
- Smith, Frederick L1
- Smith, William Neil1