A mobile client device, such as a wireless mobile or a palm sized personal digital assistant, is provided with a number of sensors and companion programming instructions/circuitry to generate a heart rate reading for a user holding the device. The sensors are used to sense blood flow rate of the user....http://www.google.es/patents/US6549756?utm_source=gb-gplus-sharePatente US6549756 - Mobile digital communication/computing device including heart rate monitor
Mobile digital communication/computing device including heart rate monitor
