Time-slicing method and apparatus for disk drive
CA 1107866 A · Owner: Xerox Corporation · Inventors: Shenfield, Leonard R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disk drive includes a first memory for storing microcoded program routines and sub-routines for the drive. One of the routines is a main program routine that is comprised of a plurality of service routines executable in sequence during a respective plurality of time-slots of the main program routine processing cycle. One of the service routines includes a plurality of service sub-routines executable in sequence with only one being executed during each processing cycle. The drive also includes a second memory having a register therein respectively associated with said one service routine. The register is capable of storing the addresses of locations in the first memory at which program …
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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 August 25, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 25, 1998.
- 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.