Method of protecting computer software
Patent 4748561 Issued on May 31, 1988. Estimated Expiration Date: 
June 27, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 27, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPlural-track record disk initialization system Microprocessor for executing enciphered programs Digital computer having code conversion apparatus for an encrypted program Computer program protection method Patent #: 4462078 InventorApplicationNo. 06/879840 filed on 06/27/1986US Classes:711/164With password or keyExaminersPrimary: Zache, Raulfe B.Attorney, Agent or FirmInternational ClassesG06F 1/00 (20060101)G06F 21/00 (20060101) AbstractThe disclosure is directed to a method of preparing a recording of a computer program whereby the recording is usable on one and only one preselected computer hardware system. The recording system of the invention comprises a two phase recording process wherein phase one of the system is utilized to record on a permanent memory element all of the basic information to be stored thereon, including a preselected application program for a computer system, as well as additional information containing instructions to make the first computer used in connection with recording a component to complete phase two of the recording process. The second phase recording aspects of the invention complete the recording of each element in an individual recording step on the selected first used computer in a manner to link the operability of the individual recording to the particular, selected first-to-be-used computer machine.Other References
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