Where does China Academy OF Railway Sciences Corporation Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), China Academy OF Railway Sciences Corporation Ltd. ranks #24,097 of 50,000 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does China Academy OF Railway Sciences Corporation Ltd. hold?

China Academy OF Railway Sciences Corporation Ltd. holds 11 US utility patents granted between 2020 and 2025, spanning 16 technology areas.

What is China Academy OF Railway Sciences Corporation Ltd.'s Innovation Score?

China Academy OF Railway Sciences Corporation Ltd. has an Innovation Score of 34.5 out of 100 (top 52% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is China Academy OF Railway Sciences Corporation Ltd.'s patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for China Academy OF Railway Sciences Corporation Ltd..

What does claim depth mean for China Academy OF Railway Sciences Corporation Ltd.'s patents?

China Academy OF Railway Sciences Corporation Ltd.'s patents average 8.6 claims each. This is an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

China Academy OF Railway Sciences Corporation Ltd.

Q: What technology areas does China Academy OF Railway Sciences Corporation Ltd. focus on?

China Academy OF Railway Sciences Corporation Ltd.'s top technology area is E01B (PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS) with 3 patents. Grants appear in 16 CPC subclasses total.

Q: How is the China Academy OF Railway Sciences Corporation Ltd. 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.

USPTO PatentsView assignee record - 11 granted patents across 16 technology areas, recorded in grant years 2020–2025. Grant-trend analysis is cross-referenced to USPTO Patent Public Search; it does not measure application filings, current R&D, or legal strength. Primary class: E01B (PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS).

Compiled by PlainPatent · May 15, 2026

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, China ranks #24,097 of 50,000 tracked US assignees by granted-patent volume, with 11 patents across 16 technology areas.

#24,097
of 50,000 US assignees by volume: Top 52%
by Innovation Score (34.5/100): 8.6
avg claims per patent

USPTO PatentsView assignee plate

Corpus R24097 · Foreign Corporation #24,097 · 11 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-PAR · TYPE-FRNCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 11 grants
MID-PACK #24,097/50,000
PHOTO-FINISH CHEMO RESEARCH S L
CPC-FOCUS E01B · 16 areas
INNOV-THIN 34.5/100
CLAIMS-PAR 8.6 claims/avg
TYPE-FRNCORP Foreign Corp
SPAN-YRS 2020–2025 · 6y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Chemo Research, S.l. (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

Qualcomm Incorporated · highest

85
China Academy OF Rai… · this assignee

35
3D Lighting Innovati… · lowest

7

What this shows China's Innovation Score is 34.5/100 (top 52% of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

Where China's grants concentrate

China Academy OF Railway Sciences Corporation Ltd. is a focused PatentsView assignee: 16 CPC subclasses with 27.3% of grants classified under E01B (PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS). Peak complete grant year is 2024 (4 grants) versus a trough of 2 in 2020. By volume, China sits between Chemo Research, S.l. and Clearcare, Inc..

China's three-year grant acceleration

China Academy OF Railway Sciences Corporation Ltd. shows 4 grants in 2022–2024 against only 4 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

Chemo Research S L

11
Chemours-mitsui F…

11
Chery Automobile

11
Chevron Japan

11
Chuanheng Furnitu…

11
Cimcon Lighting

11
CIW Enterprises

11
Clearcare

11
China Academy OF… ◀

11

What this shows China holds 11 patents at rank #24,067, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near China

By rank, the assignees closest to #24,067 in granted patent volume.

Leaders in E01B (Permanent WAY)

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

China's Innovation Score vs. every tracked assignee

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

35 Top 52% higher than 48% 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 · 2020–2025

Grants by year

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

View data table

China Academy OF Railway Sciences Corporation Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2020	2	18.2%
2021	2	18.2%
2024	4	36.4%
2025partial year	3	27.3%

Which technologies does China Academy OF Railway Sciences Corporation Ltd. patent most?

E01B - PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS 3

B61L - GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC 3

Y02A - TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE 2

E01F - ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE 2

G01M - TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR 2

H04L - TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 1

G01C - MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY 1

G01P - MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT 1

Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION 1

G01G - WEIGHING 1

B29C - SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 1

B29K - INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR ; MOULDS, ; REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS 1

C08J - WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H 1

C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS 1

B28B - SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER 1

Top 15 of 16 technology areas

Where it ranks

Overall rank by patents

#24,097

of 50,000 tracked assignees

Innovation Score

34.5 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

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

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 by PlainPatent, US Patent Intelligence Editorial Process · 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.