USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Changxin Memory Technologies, Inc.

USPTO PatentsView assignee record - 1,589 granted patents across 110 technology areas, active 2021–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H01L (SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

1,589

Total patents granted

110

CPC technology areas

15.1

Avg claims per patent

5-year filing velocity

The verdict

Changxin holds 1,589 US patents across 110 technology areas, rank #269 of 50,000 tracked assignees.

#269
of 50,000 US assignees by volume: Top 0.1%
by Innovation Score (79.5/100): 15.1
avg claims per patent

Portfolio overview

Changxin Memory Technologies, Inc. has been granted 1,589 US utility patents between 2021 and 2025, placing Changxin Memory Technologies, Inc. at rank #269 across all assignees tracked by PlainPatent. This portfolio spans 110 distinct Cooperative Patent Classification (CPC) subclasses, averaging 15.1 claims per patent with primary concentration in H01L (SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10). As a Foreign Corporation, Changxin Memory Technologies, Inc. is one of the broader-portfolio assignees in the PatentsView dataset. By volume, Changxin sits between Ecolab USA Inc. (1,610 patents, rank #265) and Meta Platforms Technologies, Llc (1,569 patents, rank #273) - the closest US assignees by grant volume. The composite Innovation Score of 79.5/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Historical data spans 2021 through 2025, with 1,589 total grants over that period. Velocity comparisons require five years of historical filings to calibrate. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. Changxin Memory Technologies, Inc.'s 15.1 average claims per patent sits within the typical range for solid legal coverage without excessive prosecution cost, while a diversified footprint across 100+ CPC subclasses spreads risk across many technology fronts. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Changxin Memory Technologies, Inc. against peers pursuing similar technology classes.

Ecolab USA

1,610
Nitto Denko

1,608
Kohler

1,594
Henkel & Kgaa

1,592
HERE Global B V

1,589
Changxin Memory ◀

1,589
Sprint Communicat…

1,574
Wuhan China STAR…

1,572
Meta Platforms

1,569

What this shows Changxin holds 1,589 patents at rank #269, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Changxin

By rank, the assignees closest to #269 in granted patent volume.

Leaders in H01L (Semiconductor Devices NOT Covered BY Class H10)

Other assignees with the most granted patents in Changxin's primary technology class.

Changxin's Innovation Score vs. every tracked assignee

Composite of portfolio volume, filing velocity, technology breadth, and claim depth (0–100)

79 Top 1% higher than 99% of 50,000 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2021–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2021–2019 baseline. Full figures in the table below.

View data table

Changxin Memory Technologies, Inc. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2021	17	1.1%
2022	86	5.4%
2023	244	15.4%
2024	736	46.3%
2025	506	31.8%

Which technologies does Changxin Memory Technologies, Inc. patent most?

H01L - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10 607

H10B - ELECTRONIC MEMORY DEVICES 565

G11C - STATIC STORES 519

H10D - INORGANIC ELECTRIC SEMICONDUCTOR DEVICES 347

G06F - ELECTRIC DIGITAL DATA PROCESSING 169

H03K - PULSE TECHNIQUE 126

G01R - MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 96

Y02D - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE 70

G03F - PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; 63

H10N - ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR 31

G05B - CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS 27

G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 26

H02H - EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS 23

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 19

H03L - AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES 16

Top 15 of 110 technology areas

Patent Moat Analysis

Portfolio Volume Strong

Tech Breadth Diversified

Claim Depth Standard

Where it ranks

Overall rank by patents

#269

Across all tracked assignees

Innovation Score

79.5 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does Changxin Memory Technologies, Inc. hold?

Changxin Memory Technologies, Inc. holds 1,589 US granted patents filed between 2021 and 2025, spanning 110 technology areas.

What is Changxin Memory Technologies, Inc.'s Innovation Score?

Changxin Memory Technologies, Inc. has an Innovation Score of 79.5 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Changxin Memory Technologies, Inc. focus on?

Changxin Memory Technologies, Inc.'s top technology area is H01L (SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10) with 607 patents. The company has filed patents in 110 CPC subclasses total.

Is Changxin Memory Technologies, Inc.'s patent filing rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for Changxin Memory Technologies, Inc..

What does claim depth mean for Changxin Memory Technologies, Inc.'s patents?

Changxin Memory Technologies, Inc.'s patents average 15.1 claims each. This falls within the standard range, providing solid legal coverage.

How is the Changxin Memory Technologies, Inc. patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

How to use this portfolio

Changxin's 1,589 grants land it in the top 0.1% by Innovation Score, but volume alone doesn't tell you where the strength sits.

Read that count against the largest US assignees before treating it as dominance - Changxin ranks #269 of 50,000. Top 50 holders
Most of this portfolio concentrates in H01L - see who else leads that technology area. H01L leaders
Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.