Method for removing funds from a postal security device
CA 2256183 C · Owner: Sisson, Robert W. · Inventors: Ryan, Frederick W. Jr.; Strobel, Kevin L.; Pierce, Perry A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for removing postal funds from a postage meter provides an accounting unit of a postage meter with indicium-related information which is invalid for mailing. The accounting unit generates a digital signature which is an encrypted value of the postal funds removed from the postage meter and other postal data including the indicium-related information. The accounting unit through a Host PC sends to a data center the amount of the postal funds removed from the postage meter and the digital signature. The data center verifies that the digital signature has been generated using the indicium-related information. The meter is disabled when the digital signature cannot be verified. When …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed December 15, 1998 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.