Patent Yard Sign in
Expired Canadian patentCanada

A memory chip architecture for digital storage of pre-recorded audio data wherein each of the memory cells are individually addressable

CA 2176988 C · Owner: Shelby, Kevin Alan · Inventors: Shelby, Kevin Alan; Grewe, Anthony James

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

A memory device for digital storage of pre-recorded audio. Contained within a housing adapted for insertion into a solid state audio player is an array of, memory cells for storage of digitally recorded audio. Each of the memory cells is, individually addressable over a parallel address bus and data is read and/or written, over a parallel data bus. Data is transmitted to and from the device by means of a, serial interface with the solid state audio player. Shift registers within the memory, device are coupled to the serial interface for transmitting serial data to and receiving, serial data from the audio player. Data buffers are interposed between the address, bus, data bus and …

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 May 21, 1996 and granted April 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 21, 2016.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2018.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 21, 1996
GrantedApril 4, 2000
Term endedMay 21, 2016
Patent numberCA 2176988 C
Classification (IPC)G11C11/34 +1 more

Timeline

Timeline From CIPO dates

1997199920012003200520072009201120132015Application filedMay 21, 1996Patent grantedApril 4, 2000Term endedMay 21, 2016

Sources & verification

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