MASI

Masimo Corp

A maker of pulse oximeters, the fingertip monitors that measure oxygen in the blood, Masimo's Signal Extraction Technology is used in hospitals around the world to read vital signs accurately even when patients move. Engineer Joe Kiani started the company in 1989 in a Mission Viejo garage, naming it Masimo by combining nicknames for his mother ("Masi") and his co-founder Mohamed Diab ("Mo").