In a scale having a digital display, the available weight range, that is the difference between the maximum allowable weight on the scale and the then-present weight on the scale, is displayed in response to activation of the tare key. The available weight range number may be displayed for a predetermined...http://www.google.es/patents/US4328875?utm_source=gb-gplus-sharePatente US4328875 - Scale with digital display of available weight range
Scale with digital display of available weight range
