Mailing machine including printing drum control system
CA 2085261 C · Owner: Pfeifer, Thomas M. · Inventors: Eckert, Alton B. Jr.; Schoonmaker, Richard P.; Gallagher, Dennis M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mailing machine base adapted to have a postage meter mounted thereon, wherein the meter includes a postage printing drum having a home position, the base comprising structure for moving the drum, a d.c. motor for driving the drum moving structure, a microprocessor a power switch, connected between the d.c. motor and microprocessor a, comparator connected between the microprocessor and d.c. motor for receiving therefrom a signal corresponding to the back e.m.f. voltage of the d.c. motor and providing a comparison signal to the microprocessor and the, microprocessor programmed for providing a reference voltage, signal for the comparator corresponding to a desired hack e.m.f. voltage for …
Read the whole patent
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 14, 1992 and granted July 14, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2014.
- 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.