INSIGHT 01Fact
68%
68% of applications are in Semiconductors
1,034 applications in this field, 689 of them in IPC H10B (Memory devices) — the main axis of the portfolio.
Method: Field applications ÷ applications with IPC
Company patentsMemory chip design and manufacturing
COMPANY PATENT INTELLIGENCE
CXMT Patent Portfolio Analysis
Explore memory-related publications for CXMT and its reviewed memory-technology subsidiary.
Partial name or date coverage · counts are lower boundsData as of 2026-10-29Data scope
- Search jurisdictions
- Worldwide
- Applicant-name basis
- Dataset-harmonized assignees (not verified current owners)
- Source search matches
- 1,570
- Published 2025-01-01 — 2025-12-31 · Source Google Patents
- Applicant names included in these statistics
- CHANGXIN MEMORY TECH INC · CHANGXIN MEMORY TECHNOLOGIES INC · CHANGXIN TECH GROUP CO LTD · CXMT CORP
- Publication dates collected
- Not recorded in this snapshot
- Reviewed names not covered
- CHANGXIN MEMORY TECHNOLOGIES, INC. · CXMT CORPORATION · 睿力集成电路有限公司 · 长鑫存储技术有限公司 · 长鑫科技集团股份有限公司
≥1,570docs
131 per month · peak 2025-01 (233)
Empty dashed outlines are uncollected periods, not zero. Dashed bars have partial name or date coverage.
01Key figures
- Applications
- 1,522
- By application number; publication and grant count once
- Invention
- 1,492
- 98% of applications
- Utility model
- 0
- 0% of applications
- Patent families
- 1,248
- By the source family ID
- Green technology
- —
- The source has no CPC codes
- Concentration
- 0.58HHI
- Sum of squared field shares; higher is more concentrated
02Technology landscape
1,522 applications with IPC codes are mapped to 35 fields using the WIPO IPC–Technology Concordance; area is the number of applications. Select a tile to see its IPC subclasses. An application can belong to several fields.
- Electrical engineering
- Instruments
- Chemistry
03Rhythm
Publications per month in each field; brighter cells mean more. It shows which directions surge in particular months.
This chart covers collected documents published from 2025-01-01 to 2025-12-31. Examination and publication processes affect this timing; it does not directly measure R&D investment in the same period.
| Technology field | 25-01 | 25-02 | 25-03 | 25-04 | 25-05 | 25-06 | 25-07 | 25-08 | 25-09 | 25-10 | 25-11 | 25-12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Semiconductors | 135 | 110 | 61 | 49 | 70 | 137 | 87 | 75 | 119 | 75 | 47 | 98 |
| Computer technology | 82 | 62 | 37 | 28 | 39 | 46 | 76 | 42 | 36 | 25 | 19 | 38 |
| Basic communication processes | 16 | 16 | 10 | 3 | 2 | 6 | 11 | 5 | 1 | 4 | 2 | 7 |
| Measurement | 10 | 8 | 1 | 2 | 0 | 3 | 3 | 3 | 2 | 0 | 0 | 3 |
| Optics | 6 | 8 | 2 | 2 | 1 | 2 | 5 | 5 | 2 | 0 | 0 | 0 |
| Control | 6 | 1 | 3 | 5 | 1 | 2 | 2 | 0 | 0 | 0 | 0 | 1 |
| Electrical machinery, apparatus, energy | 2 | 4 | 0 | 1 | 2 | 3 | 2 | 2 | 1 | 0 | 1 | 0 |
| Audio-visual technology | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 2 | 0 | 1 | 1 |
Filing years of the collected applications
Documents in the current publication window are deduplicated by application number and grouped by filing year. These are not the company's complete annual filings; older applications may only be published or granted within this window.
- 20192
- 20208
- 2021151
- 2022456
- 2023490
- 2024277
- 2025138Publication lag may still apply
Invention applications are generally published about 18 months after filing, or priority where claimed, and may be published earlier. Flags are estimated as of 2026-10-29. An unflagged year is still not necessarily complete; these counts cannot establish growth or contraction in R&D.
Multi-year evolution · With a longer collection window, this becomes a yearly view that marks the fastest-growing and shrinking fields.
04Strategy profile
Four reproducible structural ratios, with the other published companies on the same scale. Entity scopes and windows can differ, so read relative positions only — this is not a ranking.
Concentration
0.580.000.94
Position 9 of 20 published companies.
Method: Sum of squared field shares
Utility model share
0%0%33%
Position 9 of 20 published companies.
Method: Utility model documents ÷ all documents
Green technology share
—The source has no CPC codes, so this cannot be computed.
Method: Documents with CPC Y02 ÷ documents with CPC
Manufacturing and inspection share
3.1%0%50%
Position 9 of 20 published companies.
Method: Applications in measurement, chemical engineering, handling and machine tools ÷ all applications
05Collaboration
Organisations that filed jointly with the collected entities; line weight represents joint applications. Name-based candidates and reviewed relationships are labeled separately. Co-applications alone do not prove ownership.
BEIJING SUPERSTRING ACADEMY OF MEMORY TECH33Other co-applicant · relationship unverified
CHANGXI MEMORY TECH INC3Other co-applicant · relationship unverified
BEIJING CHAOXIAN MEMORY RES INSTITUTE2Other co-applicant · relationship unverified
CHANGXIN JIDIAN BEIJING MEMORY TECH CO LTD2Other co-applicant · relationship unverified
CHANGXIN MEMORU TECH INC1Other co-applicant · relationship unverified
CHANGXIN MEMORY TECH INV1Other co-applicant · relationship unverified
CHANGXIN MEMORY TECHNOLGIES INC1Other co-applicant · relationship unverified
CHANGXIN MEMORY TEHCNOLOGIES INC1Other co-applicant · relationship unverified
CHANIGXIN MEMORY TECH INC1Other co-applicant · relationship unverified
Possible affiliation is a review lead only. Co-applicants without a review record are not automatically group members or external partners, and their independent filings are not added to these statistics.
Review the entity list06Entities and scope
Entity review and data coverage are separate facts. This list shows the current entity configuration, evidence and relationship dates, matched name by name against this snapshot.
Filters change only the entity list below, not the statistics. A complete group snapshot is not available to switch to on this page.
Showing 2 of 2 entities
长鑫存储技术有限公司
SubsidiaryVerifiedSome names covered
- Names collected in this snapshot
- CHANGXIN MEMORY TECH INC · CHANGXIN MEMORY TECHNOLOGIES INC
- Names outside this snapshot
- 长鑫存储技术有限公司 · Changxin Memory Technologies, Inc.
- Recorded relationship dates
- Not recorded — Not recorded
2026官方公告确认全资子公司；BigQuery中英文原始名称可交叉核对。当前核验主体回看2025公开文献，不据此重建逐日股权或当前专利权属。
Review evidence长鑫科技集团股份有限公司
Primary entityVerifiedSome names covered
- Names collected in this snapshot
- CHANGXIN TECH GROUP CO LTD · CXMT CORP
- Names outside this snapshot
- 长鑫科技集团股份有限公司 · CXMT Corporation · 睿力集成电路有限公司
- Recorded relationship dates
- Not recorded — Not recorded
官方报告明确公司由睿力集成整体变更；BigQuery两个标准名的原始名称均对应长鑫科技集团股份有限公司。
Review evidenceRelationship dates help interpret renaming, acquisitions and joint ventures. Missing dates do not establish an indefinite relationship or verify the current patent owner.
07Publication jurisdictions
7 publication offices · 1,570 documents
Counts use the publication office of each collected document, retaining publications from the same family in different jurisdictions. This is not a map of complete families, granted or active rights; WO and EP denote international and European publication routes.
- USUnited States719
- CNChina477
- EPEuropean Patent Office publication227
- WOPCT international publication96
- TWTaiwan35
- KRSouth Korea14
- JPJapan2
08Documents
83 published documentsClear filtersNewest first
- CN121215012A
Invention publication
2025-12-26Delay measurement circuit and memory
CHANGXIN TECH GROUP CO LTD
Basic communication processesComputer technology
- CN121217129A
Invention publication
2025-12-26Phase-locked loop and delay phase-locked loop
CHANGXIN TECH GROUP CO LTD
Basic communication processes
- US2025392315A1
Invention publication
2025-12-25Delay measurement circuit and memory
CXMT CORP
Basic communication processesComputer technology
- EP4195508B1
Invention grant
2025-12-24Comparator
CHANGXIN MEMORY TECH INC
Basic communication processes
- EP4336508B1
Invention grant
2025-12-17Pulse generator, error check and scrub circuit, and memory
CHANGXIN MEMORY TECH INC
Basic communication processesComputer technology
- EP4546342A4
Invention publication
2025-12-17Information transmission method, memory, control apparatus, and electronic device
CXMT CORP
Basic communication processesComputer technology
- US12488826B2
Invention grant
2025-12-02Counting control circuit , method for counting control circuit and semiconductor memory with counting control circuit
CHANGXIN MEMORY TECH INC
Basic communication processesComputer technology
- US12475938B2
Invention grant
2025-11-18Delay control circuit and method, and semiconductor memory
CHANGXIN MEMORY TECH INC
Basic communication processesComputer technology
- EP4203319B1
Invention grant
2025-11-05Interleaved signal generating circuit
CHANGXIN MEMORY TECH INC
Basic communication processesComputer technology
- EP4325497B1
Invention grant
2025-10-29Word line drive circuit, word line driver, and storage apparatus
CHANGXIN MEMORY TECH INC
Basic communication processesComputer technologySemiconductors
- US12451885B2
Invention grant
2025-10-21Data transmission circuit, data transmission method and electronic device
CHANGXIN MEMORY TECH INC
Digital communicationBasic communication processes
- CN120768349A
Invention publication
2025-10-10Phase detector circuit, phase-locked loop circuit and memory
CHANGXIN TECH GROUP CO LTD
Basic communication processes
- EP4203316B1
Invention grant
2025-10-01Signal output circuit and delay signal output circuit
CHANGXIN MEMORY TECH INC
Basic communication processes
- US12413216B2
Invention grant
2025-09-09Delay measurement circuit and its control method
CHANGXIN MEMORY TECH INC
Basic communication processes
- US12400704B2
Invention grant
2025-08-26Input sampling system and method, storage medium, and computer device
CHANGXIN MEMORY TECH INC
Basic communication processesComputer technology
- US12387779B2
Invention grant
2025-08-12Word-line drive circuit, word-line driver and storage device
CHANGXIN MEMORY TECH INC
Basic communication processesComputer technology
- EP4318474B1
Invention grant
2025-08-06Phase adjustment circuit, delay-locked circuit and memory
CHANGXIN MEMORY TECH INC
Basic communication processesComputer technology
- US12380941B2
Invention grant
2025-08-05Power supply switching circuit and memory
CHANGXIN MEMORY TECH INC
Basic communication processesComputer technology
- TWI892068B
Other
2025-08-01Data error correction circuit and data transmission method
CHANGXIN MEMORY TECHNOLOGIES INC
Basic communication processesComputer technology
- US12374382B2
Invention grant
2025-07-29Signal sampling circuit and semiconductor memory
CHANGXIN MEMORY TECH INC
Basic communication processesComputer technology
Titles come from the source bibliography. Select a number to read the full document on this site.
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09Method and sources
Counting units
Publications are deduplicated by publication number; applications by application number, so a publication and its grant count once; families by the source family ID. Technology fields are derived automatically from IPC codes using the WIPO IPC–Technology Concordance (March 2026), without manual or AI labeling.
Publication or grant documents do not establish current rights. Check legal status and current owners with the relevant patent office.
Entity scope
These statistics use only the applicant names and publication dates collected for this snapshot. They do not represent the full company or group portfolio.
- Search jurisdictions
- Worldwide
- Applicant-name basis
- Dataset-harmonized assignees (not verified current owners)
- Applicant names included in these statistics
- CHANGXIN MEMORY TECH INC · CHANGXIN MEMORY TECHNOLOGIES INC · CHANGXIN TECH GROUP CO LTD · CXMT CORP
- Reviewed names not covered
- CHANGXIN MEMORY TECHNOLOGIES, INC. · CXMT CORPORATION · 睿力集成电路有限公司 · 长鑫存储技术有限公司 · 长鑫科技集团股份有限公司
Current entity configuration and review evidence
The reviewed entities and aliases below describe the current company configuration. Only names listed above are covered by this snapshot.
长鑫存储技术有限公司
Configured aliases: Changxin Memory Technologies, Inc. · CHANGXIN MEMORY TECH INC · CHANGXIN MEMORY TECHNOLOGIES INC
Original review note: 2026官方公告确认全资子公司；BigQuery中英文原始名称可交叉核对。当前核验主体回看2025公开文献，不据此重建逐日股权或当前专利权属。
Review evidence长鑫科技集团股份有限公司
Configured aliases: CXMT Corporation · 睿力集成电路有限公司 · CHANGXIN TECH GROUP CO LTD · CXMT CORP
Original review note: 官方报告明确公司由睿力集成整体变更；BigQuery两个标准名的原始名称均对应长鑫科技集团股份有限公司。
Review evidenceData sources
- Google Patents · PartialPublished 2025-01-01 to 2025-12-31 · retrieved 2026-10-29 · 1,570 included · 0 out of scopeSource and terms
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