Device for establishing cell boundaries in a bit stream and crc calculation
CA 2179296 C · Owner: Koninklijke Kpn N.V. · Inventors: Vankan, Franciscus Anna Gerardus; Nielander, Johan Wieant Gerlach
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for establishing boundaries in a bit stream is disclosed which converts a first number of bits of the bit stream into a second number of bits (that is, the CRC is determined) and compares the second number of bits with a third number of bits of the bit stream. The converting means comprise discounting means for discounting the effect on the conversion process of at least one bit situated outside the first number of bits. The device establishes the boundary of the bit stream after a minimal time span even for very high bit rates per bit, shift.
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 December 23, 1994 and granted October 17, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 23, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 23, 2016.
- 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.