| Company | Location |
|---|---|
| Philip D. Freedman PC | Alexandria, Virginia, United States |
| Phoenix Bioscience Inc. | Pleasanton, California, United States |
| Phononic Devices, Inc. | Raleigh, North Carolina, United States |
| Phoseon Technology Inc. | Hillsboro, Oregon, United States |
| PhosphoSolutions Inc. | Aurora, Colorado, United States |
| Photo Sciences Inc. | Torrance, California, United States |
| PhotoMetrics Inc. | Huntington Beach, California, United States |
| Photonfocus AG | Lachen, Switzerland |
| Photonics Spectra | Pittsfield, Massachusetts, United States |
| Photonics Spectra / Biophotonics International | Berkshire Common, Massachusetts, United States |
