In combination with a conventional sphygmomanometer, a solenoid, an air release valve connected to the solenoid for the release of air from the cuff bladder of the sphygmomanometer, a pressure transducer for determining air pressure in the cuff bladder and generating a pressure data signal, a data processing...http://www.google.ca/patents/US5201320?utm_source=gb-gplus-sharePatent US5201320 - Blood pressure measuring device
