September 25, 2021. 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 ReferencesPortable, non-volatile read/write memory module Write protect control circuit for computer hard disc systems Method for storing data in an electrically erasable memory for carrying out this method Securing a computer against undesired write operations to or read operations from a mass storage device Write protection device for computer hard disk Computer file protection system Computer system including a write protection circuit for preventing illegal write operations and a write poster with improved memory Method for assuring that an erase process for a memory array has been properly completed Absolute static lock of files and directories on magnetic disk storage media in single machine personal microcomputers Method and apparatus for preventing unauthorized access to peripheral devices InventorsApplicationNo. 09961417 filed on 09/25/2001US Classes:711/112, Direct access storage device (DASD)711/163, Access limiting711/164, With password or key713/161, Data authentication713/164, Security kernel or utility713/165, File protection713/166Security levelsExaminersPrimary: Sparks, DonaldAssistant: Dinh, Ngoc V Attorney, Agent or FirmForeign Patent References
International ClassG06F 1200AbstractA blocking device provides read and write protection for computer long-term storage devices, such as hard drives. The blocking device is placed between a host computer and the storage device. The blocking device intercepts communications between the host and the storage device and examines any commands from the host to the storage device. Certain commands, such as commands that may modify the storage device, may be discarded.Other References
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