Patents
US 12159053 B1: Systems and methods for identifying counterfeit memory
- Granted
- 2024-12-03
- Filed
- 2022-07-29 application 17877023
- Type
- Utility · 7 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A memory authentication system initiates various memory operations on a memory chip and then assesses the performance of the memory chip in performing such operations in an attempt to identify a signature in the chip's performance that can be used to identify the chip's source. As an example, a partial erase operation may be performed on programmed memory cells in order to drain some charge from the cells but allowing some charge to remain in the cells. Due to process variations during manufacturing, charge should drain from the cells at different rates such that some of the cells may flip to an erase state while other cells remain in a program state. The pattern of bit flips defines a unique signature that may be used to identify the chip's manufacturing source (e.g., the foundry at which the chip was manufactured).
Source: PVGPATDIS, file of 2026-04-10 (ipg241203.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Board of Trustees of the Univeristy of Alabama, for and on behalf of the University of Alabama in Huntsville 88 patents | US company or organization | Huntsville, AL | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Biswajit Ray | Madison, AL | 34 | PVGPATDIS, file of 2026-04-10 | |
| Aleksandar Milenkovic | Madison, AL | 5 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G06F | Electric digital data processing | G06F3/0652 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2024-05-23 | Assignment Assignment of assignor's interest | MILENKOVIC, ALEKSANDER signed 2024-04-30 RAY, BISWAJIT signed 2024-04-30 | BOARD OF TRUSTEES OF THE UNIVERSITY OF ALABAMA, FOR AND ON BEHALF OF THE UNIVERSITY OF ALABAMA IN HUNTSVILLE HUNTSVILLE, AL | 67511/65 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.