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Expired Canadian patentCanada

Device and a method of securing data

CA 1318410 C · Owner: Heidelbereger Druckmaschinen Aktiengesellschaft · Inventors: Rodi, Anton; Hauck, Dieter

CIPO record

Overview

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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-552 21.12.1987, - 6 - Sc113108, ABSTRACT The invention relates to a device and a method of securing data given influences which are caused e.g. by maintenance work and which act on an electronic system. In order to prevent the data from getting lost the data is stored on different system cards. By inquiring a storage cell a possible loss of data can be recognized.

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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 May 25, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 25, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 3, 1988
GrantedMay 25, 1993
Term endedMay 25, 2010
Patent numberCA 1318410 C
Classification (IPC)G06F12/16 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedNov 3, 1988Patent grantedMay 25, 1993Term endedMay 25, 2010

Sources & verification

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