Process and a device for the protection of software
CA 1280830 C · Owner: Novomatic Automatenhandelsgesellschaft M.B.H. & Co. Kg · Inventors: Schobitz, Edmund
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the protection of software stored in a memory against unauthorized copying with the commands, and/or data fed to a microprocessor on inquiry and converted during this operation. In order to make copying more difficult it is provided, according to the invention to change the mode of code conversion of at least one requested command and/or data byte as a function of at least one previously requested command and/or data byte. In a device for the protection of software stored in at least one command and/or data memory, the improvement comprises that the code converting function of the code converter is changeable for at least one command and/or data byte …
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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 February 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 26, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.