Redwood City, Calif.
Medical technology
CEO: Andrew Thompson, 45
Proteus makes tiny microchips implanted in pills that record and transmit how the body reacts. The data is stored temporarily in a patch placed on the patient's skin, then periodically downloaded to the patient's mobile phone so it can be forwarded to the doctor. The system can be used for long-distance monitoring of patients with cardiac problems, as well as making sure that people with infectious diseases or mental illnesses