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Expired Canadian patentCanada

Method and apparatus for validating travelling object-oriented programs with digital signatures

CA 2120666 C · Owner: Fischer, Addison M. · Inventors: Fischer, Addison M.

CIPO record

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Abstract From the Canadian patent

A method of operating computers in accordance with an enhanced object-oriented programming methodology creates a framework for efficiently performing automated business transactions. The object-oriented programming methodology is used in conjunction with a travelling program i.e. a digital data structure which includes a sequence of instructions and associated data which has the capability of determining at least one next destination or recipient for receiving the travelling program and for transmitting itself together with all relevant data determined by the program to the next recipient or destination Using the methods described herein the data is more closely bound to the program in such …

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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

  • Filed April 6, 1994 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2014.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2016.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 6, 1994
GrantedJuly 27, 1999
Term endedApril 6, 2014
Patent numberCA 2120666 C
Classification (IPC)G06F13/14 +2 more

Timeline

Timeline From CIPO dates

1995199719992001200320052007200920112013Application filedApril 6, 1994Patent grantedJuly 27, 1999Term endedApril 6, 2014

Sources & verification

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