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Expired Canadian patentCanada

Memory means with multiple word read and single word write

CA 1256217 A · Owner: Wang Laboratories, Inc. · Inventors: Whipple, David L.; Mann, Edward D.

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Abstract From the Canadian patent

A memory wherein the basic unit of information is a multiple of word size providing, in the read aspect for reads of multiple information, units in a single read operation and in the write aspect, for writes of, a single word. In the read aspect the memory includes a memory unit having a memory store for storing units of information and a memory unit controller. Each read request includes an initial address and specifies a number of units of information. The memory unit controller is responsive to a request specifying one or more units of information for generating in a single memory operation a sequence of addresses, the sequence of addresses beginning at the initial address and containing …

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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 20, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 20, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 18, 1986
GrantedJune 20, 1989
Term endedJune 20, 2006
Patent numberCA 1256217 A
Classification (IPC)G06F12/04

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedMarch 18, 1986Patent grantedJune 20, 1989Term endedJune 20, 2006

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