The wireless key with memorized acknowledgment
CA 2437460 A1 · Owner: He, Minco Guangming · Inventors: He, Minco Guangming
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The wireless key with memorized acknowledgement is used on the key to lock or unlock the door or switch. The key is composed of two display an antenna, two , push, button, a case and an embedded microcontroller which is embedded a , transceiver, controller memory and DES encryption /decryption. After you push the button on the, key to lock the door, the lock status(locked/unlocked) need to be transmitted back to, the key to be memorized for indication. When the user forgets if he/she locks the door, he/she will press the "lock" or "unlock" button the status stored on the , memory will be displayed by the LED. If more keys are used and they are nearby, they will synchronize each other …
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 August 11, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 11, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 2025.
- 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.