Compression of data for storage
CA 1234633 A · Owner: Wang Laboratories, Inc. · Inventors: Roy, Roland W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A method is disclosed for compressing binary numbers to be stored in a memory. A first number to be stored is first determined to be in one of several bit size ranges, and depending on the bit size range a fixed value number is subtracted from the first number. A second number resulting from the subtraction process has two binary bits are prefixed thereto and the combination is stored in memory. The two binary bit prefix identifies the particular bit size range and thereby the fixed value number originally subtracted from the first number. On reading out the second number with two bit prefix the fixed value, number identified by the two bit prefix is added back to …
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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 March 29, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 29, 2005.
- 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.