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Expired Canadian patentCanada

Information memory devices

CA 1188425 A · Owner: Nippon Telegraph & Telephone Public Corporation · Inventors: Tawara, Kanji; Nikaido, Tadanobu; Miyahara, Norio

CIPO record

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Abstract From the Canadian patent

In an information memory device of the type wherein information are sequentially stored in cells of a memory cell array and read out from the cells according to address informations, there are provided an internal address information generator for generating an internal address information, an address information selector for selecting either one of the internal address information and an external address information supplied from outside to form an address information, and an information memory circuit for storing a memory information at an position designated by the address information and for reading out the information stored in the designed position. The memory device of this invention …

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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 June 4, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 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.
FiledJune 9, 1982
GrantedJune 4, 1985
Term endedJune 4, 2002
Patent numberCA 1188425 A
Classification (IPC)G11C7/00 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedJune 9, 1982Patent grantedJune 4, 1985Term endedJune 4, 2002

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