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Expired Canadian patentCanada

Digital signal processing system including a microprogram memory

CA 1193021 A · Owner: Sony Corporation · Inventors: Hamada, Osamu

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Abstract From the Canadian patent

Described is a digital signal processor including at least two memories, that is, a microprogram memory for storing a series of microinstructions for instructing a digital signal processing procedure, and a coefficient memory for storing coefficient data required for performing a series of arithmetic operations on the digital signal data. These data being transferred and written into said microprogram memory and said coefficient memory from a host computer system. The coefficient memory has at least two pages corresponding to the total memory area which may be addressed during digital signal processing to be effected by said microinstructions. Page selection of the coefficient memory may be …

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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 September 3, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 3, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 28, 1983
GrantedSeptember 3, 1985
Term endedSeptember 3, 2002
Patent numberCA 1193021 A
Classification (IPC)G06F9/22 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedJan 28, 1983Patent grantedSep 3, 1985Term endedSep 3, 2002

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.