Patents
US 11481271 B2: Storage system and method for using subcodes and convolutional-based LDPC interleaved coding schemes with read threshold calibration support
- Granted
- 2022-10-25
- Filed
- 2021-03-16 application 17202601
- Type
- Utility · 21 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A storage system generates a low-density parity check (LDPC) code from a plurality of subcodes. The storage system stores each subcode in a different page of a word line in the memory. The subcode can be stored in one plane in the memory or across multiple planes. When the subcodes are stored across multiple planes, they can be stored in a checkboard pattern.
Source: PVGPATDIS, file of 2026-04-10 (ipg221025.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| WESTERN DIGITAL TECHNOLOGIES, INC. 4,838 patents | US company or organization | San Jose, CA | WESTERN DIGITAL TECHNOLOGIES INC. Federal lobbying client EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Eran Sharon | Rishon LeZion, IL | 325 | PVGPATDIS, file of 2026-04-10 | |
| Idan Goldenberg | Ramat HaSharon, IL | 20 | PVGPATDIS, file of 2026-04-10 | |
| Idan Alrod | Herzliya, IL | 228 | PVGPATDIS, file of 2026-04-10 | |
| Ran Zamir | Ramat Gan, IL | 92 | PVGPATDIS, file of 2026-04-10 | |
| Alexander Bazarsky | Holon, IL | 193 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G06F | Electric digital data processing | G06F11/1044 | PVGPATDIS, file of 2026-04-10 |
| G11C | Static stores | G11C29/52 | 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 |
|---|---|---|---|---|---|
| 2025-04-25 | Release of security interest Partial release of security interests | JPMORGAN CHASE BANK, N.A., AS AGENT signed 2025-04-24 | SANDISK TECHNOLOGIES, INC. MILPITAS, CA | 71382/1 | PASDL, file of 2026-10-15 |
| 2025-04-25 | Security interest Security interest Security agreement | SANDISK TECHNOLOGIES, INC. signed 2025-04-24 | JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT CHICAGO, IL | 71050/1 | PASDL, file of 2026-10-15 |
| 2024-08-23 | Security interest Security interest Patent collateral agreement | SANDISK TECHNOLOGIES, INC. signed 2024-08-20 | JPMORGAN CHASE BANK, N.A., AS THE AGENT CHICAGO, IL | 68762/494 | PASDL, file of 2026-10-15 |
| 2024-06-27 | Name change Change of name | SANDISK TECHNOLOGIES, INC. signed 2024-06-21 | SANDISK TECHNOLOGIES, INC. MILPITAS, CA | 67982/32 | PASDL, file of 2026-10-15 |
| 2024-05-29 | Assignment Assignment of assignor's interest | WESTERN DIGITAL TECHNOLOGIES, INC. signed 2024-05-03 | SANDISK TECHNOLOGIES, INC. MILPITAS, CA | 67567/682 | PASDL, file of 2026-10-15 |
| 2023-08-21 | Other Patent collateral agreement - ddtl loan agreement | WESTERN DIGITAL TECHNOLOGIES, INC. signed 2023-08-18 | JPMORGAN CHASE BANK, N.A. CHICAGO, IL | 67045/156 | PASDL, file of 2026-10-15 |
| 2023-08-21 | Other Patent collateral agreement - a&r loan agreement | WESTERN DIGITAL TECHNOLOGIES, INC. signed 2023-08-18 | JPMORGAN CHASE BANK, N.A. CHICAGO, IL | 64715/1 | PASDL, file of 2026-10-15 |
| 2022-02-08 | Release of security interest Release of security interest at reel 056285 frame 0292 | JPMORGAN CHASE BANK, N.A. signed 2022-02-03 | WESTERN DIGITAL TECHNOLOGIES, INC. IRVINE, CA | 58982/1 | PASDL, file of 2026-10-15 |
| 2021-05-19 | Security interest Security interest Security interest | WESTERN DIGITAL TECHNOLOGIES, INC. signed 2021-05-07 | JPMORGAN CHASE BANK, N.A., AS AGENT CHICAGO, IL | 56285/292 | PASDL, file of 2026-10-15 |
| 2021-03-16 | Assignment Assignment of assignor's interest | ALROD, IDAN signed 2021-03-11 GOLDENBERG, IDAN signed 2021-03-11 SHARON, ERAN signed 2021-03-11 BAZARSKY, ALEX signed 2021-03-13 ZAMIR, RAN signed 2021-03-16 | WESTERN DIGITAL TECHNOLOGIES, INC. SAN JOSE, CA | 55604/666 | 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.