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Patent US4462078A successfully refreshed from Google Patents.
US4462078A
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Computer program protection method
Assignee: Individual
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Filing: 1982-08-02
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Granted: 1984-07-24
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Expires: 2002-08-02
Abstract
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.
Inventors
- 👤 Ron Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:41
CPC Classifications
G; G06; G06F; G06F21/00; G06F21/10; G06F21/12; G06F21/121; G06F21/123; G11; G11B; G11B20/00; G11B20/00086; G11B20/00094; G11B20/00123; G11B20/0092; G11B20/00927
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
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.
Claim 2
Dependent Claim
104 words
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.
Claim 3
Dependent Claim
31 words
The protection method of claim 1 wherein there is additionally included the step of disabling the computer upon the verification of the storing of said code signal at said predetermined location.
Claim 4
Dependent Claim
53 words
The protection method of claim 2 wherein said recording medium utilization step utilizes a bona fide recording medium constrained to reject program instructions at said predetermined location of a characteristic sufficient to carry out said instructions at said locations on a recording medium where said computer program is attempted to be similarly copied.
References Cited (Backward Citations)
US4278837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |