Automatic file differencing and updating system
Patent 5832520 Issued on November 3, 1998. Estimated Expiration Date: 
November 22, 2016. 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.
November 22, 2016. 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 ReferencesVersion management system using pointers shared by a plurality of versions for indicating active lines of a version File based and highly available hybrid database Text editor using insert, update and delete structures for undo and redo operations Script-based data communication system and method utilizing state memory Method for detecting computer memory access errors Patent #: 5644709 InventorAssigneeApplicationNo. 754486 filed on 11/22/1996US Classes:707/203Version managementExaminersPrimary: Amsbury, WayneAttorney, Agent or FirmInternational ClassG06F 017/30AbstractA method and file structure for generating an efficient difference files from and old file and a new file so that a difference file can be transmitted to a second computer system where the difference file and a duplicate of the old file can quickly be used to create a copy of the new file is disclosed. A differencing process compares an old file and a new file to generate a difference file in which the old file is used as a database of byte strings. The differencing process reads strings of data from the new file, searches for the existence of those strings in the old file, and notes the locations in the old file in which strings in the new file are found and stores in a difference file an indication of the location where a matching string is found and an indication of the length. A specific file structure for the difference file is disclosed.Other References
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