An apparatus for weighing a patient while the patient remains in bed including at least one flexible potentiometer mounted on top of a bed or mattress having a known compliance, i.e. known degree of flexure for a given weight, and connected to an electrical system for detecting and measuring the resistance...http://www.google.es/patents/US6180893?utm_source=gb-gplus-sharePatente US6180893 - Patient weighing apparatus
