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Expired Canadian patentCanada

Random access memory arrangements

CA 1164563 A · Owner: Sony Corporation · Inventors: Thirlwall, Alan C.; Ive, John G.S.

CIPO record

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

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Abstract From the Canadian patent

A random access memory arrangement for reading data out of and into a random access memory asynchronously, for example to effect time base, correction of a digital television signal comprises the random access memory, having common read and write data terminals an input circuit for supplying, input data to said read and write data terminals for writing in the random access memory, a first output latch circuit connected to the read and write data terminals, a second output latch circuit connected to the first latch circuit, and means for supplying control signals to enable the random access memory to write the input data therein at given addresses in synchronism with write pulses of a write …

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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 27, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 2001.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 16, 1981
GrantedMarch 27, 1984
Term endedMarch 27, 2001
Patent numberCA 1164563 A
Classification (IPC)G11C11/34 +2 more

Timeline

Timeline From CIPO dates

1982198419861988199019921994199619982000Application filedSep 16, 1981Patent grantedMarch 27, 1984Term endedMarch 27, 2001

Sources & verification

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