Cyclic redundancy check operating method and a head error checker synchronizing unit in an asynchronous transfer mode switching method
CA 2062855 C · Owner: Yoshimura, Shuji · Inventors: Yoshimura, Shuji; Uriu, Shiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A CRC (Cyclic Redundancy Check) operating unit performs a CRC operation on received data using as an initial value a CRC operation result actual value obtained in the previous operation, and outputs a CRC operation result actual value. A delay unit delays the CRC operation result actual value by the lime taken for a header part to be entered. The CRC operation result derivation unit outputs as a CRC operation result derivation value an operation result obtained by a CRC operation performed for all the receiving data of a header part provided with the above described CRC code using the CRC operation result actual value as an initial value. The coincidence detecting unit compares the CRC …
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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
- Filed March 12, 1992 and granted April 1, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 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
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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.