Hash-based translation method and apparatus with multiple level collision resolution
CA 2276191 C · Owner: Enterasys Networks, Inc. · Inventors: Spinney, Barry A.; Poole, Nigel T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A translation is performed by using a programmable hashing technique on an input number to generate a hashed number (408). A subset (410) of the hashed number bits are used to index a first hash table (420). In first hash table locations (426) where a hash collision does not occur the first hash table , entry (426) contains an index (for IDX) into an output (438) table which contains the desired translated output number (436). In first hash table locations where a hash collision occurs (424) the first hash table entry , (494) contains a pointer (NTI) to a first resolution table area in a second hash table. The first resolution table area contains entries which are indexed by …
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 30, 1997 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 30, 2019.
- 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.