http://www.w3.org/ns/prov#value | - The device computes postage due and other varying charges such as insurance and Express Mail and incorporates a spring mounted electronic...http://www.google.com/patents/US5307281?utm_source=gb-gplus-sharePatent US5307281 - Device for weighing and automatically calculating postage for a mailing pieceAdvanced Patent SearchPublication numberUS5307281 APublication typeGrantApplication numberUS 07/732
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