Invalidity dossier
US 8495282
Flash-aware storage optimized for mobile and embedded DBMS on NAND flash memory
Current assignee: Oracle International Corp
Added 9/21/2026, 9:32:05 AM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview: US 8,495,282 B2
Title: Flash-aware storage optimized for mobile and embedded DBMS on NAND flash memory
Patent Number: US 8,495,282 B2
Application Number: US 12/945,106
Assignee: Oracle International Corp (original and current assignee per the listing)
Inventors: SangCheol Lee, BongSoo Ko, HyungGook Yoo, SongHee Kang
Priority Date: 2007-05-16
Filing Date: 2010-11-12
Publication Date (grant): 2013-07-23
Adjusted Expiration: 2027-08-07
Legal Status: Active (as listed; the source notes this is an assumption, not a legal conclusion)
Purpose:
The patent addresses inefficiencies in running a database management system (DBMS) on NAND-type flash memory. NAND flash requires relatively slow erase operations on blocks before data can be updated in place, creating significant I/O overhead and making conventional DBMS use inefficient on such devices.
Plain-Language Scope:
According to the supplied excerpt, the disclosed systems and methods use a "virtual page map" layer between the flash memory device and an access component of a mobile device. The mobile device stores data in physical pages in flash memory and temporarily holds copies in a cache memory component. The virtual page map maps logical page numbers in cache memory to physical page numbers in flash memory, so data updates execute against logical pages in cache, reducing reads and writes to flash.
When data is committed, it is written to a physical page; the page map determines whether a physical page exists or a new page must be allocated, then remaps page numbers and releases the logical page. The map maintains a copy in nonvolatile storage for recovery after crashes or failures. It can use a bitmap structure divided into segments, flushing a segment only when needed to minimize I/O.
The approach reportedly aims to eliminate data journaling/logging for recovery, defer data modification until transaction commit, and reduce write and erase counts on flash memory.
Source: https://patents.google.com/patent/US8495282/en
What the excerpt does not establish: The excerpt does not include the full claims, detailed figures, dependent claim limitations, prosecution history, or quantitative performance results (the text cuts off mid-sentence at "demonstrated average impro"). It also provides no information on validity, litigation, ownership transfers, or specific prior-art references beyond general background.
Generated 10/1/2026, 10:02:14 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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