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US 4,462,078 AGranted
Computer program protection method
OwnerRon Rossinventor
Life of this patent
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Abstract
A computer program protection method which permits copying of the program by a user, but which incorporates a novel information coding technique to prevent operational response by the computer using a copy.
Claims3
In a computer program protection method intended to distinguish between computer programs recorded on a bona fide recording medium and corresponding programs copied from such bona fide medium onto a similar recording medium, the steps of:
- a. Writing a code signal at a predetermined location in said information recording medium in accordance with an instruction incorporated within the program to be protected;
- b. Verifying in the computer the code signal stored at said predetermined location;
- and
- c. The step of utilizing as said bona fide recording medium, a medium which is unresponsive to such instruction to write said code signal at said predetermined location.
1 more element
Dependencies are inferred from the claim text.