An adaptable communication apparatus and an adaptable communication system
CA 2179971 C · Owner: Canon Kabushiki Kaisha · Inventors: Yamamoto, Takahisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A communication device according to the present invention comprises an enciphering transmitter for enciphering data and transmitting enciphered data a counter for obtaining a count of a quantity of enciphered data and an accounting circuit for calculating in accordance with the count held by the counter an amount to charge a user for the data.
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 June 26, 1996 and granted October 30, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 26, 2018.
- 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.