U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

System for updating data stored on a flash-erasable, programmable, read-only memory (FEPROM) based upon predetermined bit value of indicating pointers

Patent 5392427 Issued on February 21, 1995. Estimated Expiration Date: Icon_subject May 18, 2013. 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 References

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Inventors

Assignee

Application

No. 063496 filed on 05/18/1993

US Classes:

707/205, File allocation715/533Spell Check

Examiners

Primary: Lall, Parshotam S.
Assistant: Lim, Krisna

Attorney, Agent or Firm

International Class

G06F 015/40

Abstract

A method and system for updating data stored on a computer storage device are provided. The data is contained in records or entries. Each record or entry has a primary pointer and an indicator. The indicator initially has each bit set to a predefined bit value. When data is to be updated (and thus, the record or entry containing the data is to be superseded), at least one bit of the indicator is changed from the predefined bit value to another bit value to point to the new record or entry and to indicate that the data in the new record or entry is an update of the data in the superseded record or entry. This method and system are especially suitable to be used in a write-once computer storage device.

Other References

  • Althoff Jr., et al.; "Building Data Structure in the Smalltalk-80 System"; Byte; Aug. 1981; pp. 230-278 (even pages only)
  • Kruse, R., "Data Structures of Program Design," Prentice-Hall, 1984, pp. 40-83
  • Cooper, D. et al., "OH!Pascal," Norton, 1982, pp. 475-52
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