Coupon validation terminal
CA 2000134 C · Owner: Gn Electronics Inc. · Inventors: Finch, W. John; Wild, Gary
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coupon validation system for interpreting coupons presented thereto, each of the coupons incorporating a bar code having a validation date and a message code. The system comprises a real time clock for maintaining a current date record, a memory for storing one or more winning number codes, apparatus for receiving a coupon presented to the system and in response reading the bar code, and a microcomputer for comparing the validation date with the current date record and in the event the current date record is not equal to the validation date then rejecting the coupon, and in the event the current date record is equal to the validation date then comparing the one or more winning number …
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 October 4, 1989 and granted February 15, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 4, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 4, 2011.
- 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.