Creator
- Partington, J. R. (James Riddick), 1886-19651
- Patterson, Robert Porter, 1891-19521
- Paul Altman K.-G.1
- Paul Tausig & Son, Inc.2
- Paul, Theodor, 1862-19282
- Paweck, Heinrich, 1870-19411
- Pechmann, Hans von, 1850-19021
- Peschkowsky, Paul1
- Petit, Pierre Lanith, 1832-19091
- Pettersson, Otto, 1848-19412
- Pfeiffer, Paul, 1875-19512
- Physikalisches Institut1
- Pirou, Eugène, 1841-19091
- Planck, Max, 1858-19475
- Podvin, Edward C.1
- Pohl, Robert Wichard, 1884-19765
- Pohle, H. E.1
- Polák, Jiří1
- Presbyterian Hospital (New York, N.Y.)1
- Quincke, Georg Hermann, 1834-19241