Pfeifer George F.
Pfistner Harald
Philipp Harald
Philips Gerald J.
Phillips E. Alan
Phillips Jack E.
Photon Kinetics Inc.
Photonetics
Photonix Industries
Physik-Instruments (PI) GmbH & Co. KG
Picanyol Josep
Pichery Thierry
Pickering Terence J.
Pidgeon Brian George
Piekarski Michael
Pierce K.
Pierrat Jean Joseph Henri
Pilevar Saeed
Piligian George J.
Pinard Adam