A device for weighing and automatically computing the postage due on all services offered by a postal authority of a given country, both domestically and internationally. The device computes postage due and other varying charges such as insurance and Express Mail and incorporates a spring mounted electronic...http://www.google.fr/patents/US5307281?utm_source=gb-gplus-shareBrevet US5307281 - Device for weighing and automatically calculating postage for a mailing piece
Device for weighing and automatically calculating postage for a mailing piece
