Adaptive data ciphering/deciphering apparatuses and data communication system using these apparatuses
CA 1337997 C · Owner: Miyasaka, Toshikazu · Inventors: Matsumoto, Kenichi; Miyasaka, Toshikazu; Shigemitsu, Mineo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A data communication system for transmitting ciphered or non-ciphered data between a data transmitting device and a data receiving device via a data transmission line. A data ciphering apparatus includes switching devices that, switch the connection between the data transmitting device and the transmission line to enable an insertion of the ciphering apparatus. Connected with the switching devices there is a line conditioner for detecting a call from the data transmitting device a control code, monitor for monitoring communication control codes from the data transmitting device, a scrambler for ciphering the data transmitted from the data transmitting device after the detection of the …
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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
- Granted January 23, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2013.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.