Electrical computers and digital processing systems: support – Clock – pulse – or timing signal generation or analysis – Counting – scheduling – or event timing
Reexamination Certificate
1999-12-31
2004-12-28
Butler, Dennis M. (Department: 2115)
Electrical computers and digital processing systems: support
Clock, pulse, or timing signal generation or analysis
Counting, scheduling, or event timing
C377S044000, C377S107000
Reexamination Certificate
active
06836853
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to the field of computer systems. More particularly, the present invention relates to the field of monotonic counters for use by computer systems.
2. Description of Related Art
Monotonic counters are typically used in computer systems to maintain a count that can only be incremented over the life of the counter. Monotonic counters help ensure, for example, a prior count or event based on a prior count will not happen again. Monotonic counters may be used, for example, for the assignment of unique numbers or identifiers.
BRIEF SUMMARY OF THE INVENTION
A value for a first counter is maintained. A value for a second counter based on a content of a non-volatile memory is maintained. Updates to the value for the first counter and to the value for the second counter are controlled.
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M'hammed Hnniche, MGI: an Incremental Bottom-Up Algorithm, 1994 IEEE, pp. 347-351.*
U.S. Appl. No. 09/339,012, filed Jun. 23, 1999, entitled Counter With Non-Uniform Digit Base, by Steven E. Wells.
U.S. Appl. No.: 09/379,175, filed Aug. 23, 1999, entitled Method and System for Implementing a Digit Counter Optimized for Flash Memory, by Steven E. Wells.
Dover Lance W.
Gafken Andrew H.
Blakley Sokoloff Taylor & Zafman LLP
Butler Dennis M.
Suryawanshi Suresh
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