Where does China Railway NO. 3 Engineering Group Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), China Railway NO. 3 Engineering Group Co., Ltd. ranks #39,441 of 49,997 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 Railway NO. 3 Engineering Group Co., Ltd. hold?

China Railway NO. 3 Engineering Group Co., Ltd. holds 6 US utility patents granted between 2021 and 2025, spanning 7 technology areas.

What is China Railway NO. 3 Engineering Group Co., Ltd.'s Innovation Score?

China Railway NO. 3 Engineering Group Co., Ltd. has an Innovation Score of 40.5 out of 100 (top 35% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does China Railway NO. 3 Engineering Group Co., Ltd. focus on?

China Railway NO. 3 Engineering Group Co., Ltd.'s top technology area is E01D (Construction OF Bridges, ; Elevated ROADWAYS; OR VIADUCTS; Assembly OF Bridges) with 2 patents, ranking #28 of 86 assignees active in that subclass. Grants appear in 7 CPC subclasses total.

Is China Railway NO. 3 Engineering Group Co., Ltd.'s patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for China Railway NO. 3 Engineering Group Co., Ltd..

What does claim depth mean for China Railway NO. 3 Engineering Group Co., Ltd.'s patents?

China Railway NO. 3 Engineering Group Co., Ltd.'s patents average 7.3 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 Railway NO. 3 Engineering Group Co., Ltd.

Q: How is the China Railway NO. 3 Engineering Group Co., 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 - 6 granted patents across 7 technology areas, recorded in grant years 2021–2025. 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: E01D (Construction OF Bridges, ; Elevated ROADWAYS; OR VIADUCTS; Assembly OF Bridges).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, China ranks #39,441 of 49,997 tracked US assignees by granted-patent volume, with 6 patents across 7 technology areas.

#39,441
of 49,997 US assignees by volume: Top 35%
by Innovation Score (40.5/100): 7.3
avg claims per patent

USPTO PatentsView assignee plate

Corpus R39441 · Foreign Corporation #39,441 · 6 grants

GRANTS-MICRO · LOWER-Q · PHOTO-FINISH · CPC-NARROW · INNOV-PAR · CLAIMS-SPARSE · TYPE-FRNCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 6 grants
LOWER-Q #39,441/49,997
PHOTO-FINISH Chengdu Youyang…
CPC-NARROW E01D · 7 areas
INNOV-PAR 40.5/100
CLAIMS-SPARSE 7.3 claims/avg
TYPE-FRNCORP Foreign Corp
SPAN-YRS 2021–2025 · 5y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Chengdu Youyang Electromechanical Product Design Co., Ltd. (±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.

How China’s 40.5 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 6.7 pts (17%) Velocity 20.0 pts (49%) Breadth 9.4 pts (23%) Claim depth 4.4 pts (11%)

Qualcomm Incorporated · highest

85
China Railway NO 3… · this assignee

40
3D Lighting… · lowest

7

What this shows China's Innovation Score is 40.5/100 (top 35% 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.

Does more volume mean deeper claims for China?

Each dot is one of China’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). China’s own 7.3 claims/patent is at or below the 10.2 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

China vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where China's grants concentrate

China Railway NO. 3 Engineering Group Co., Ltd. is a focused PatentsView assignee: 7 CPC subclasses with 33.3% of grants classified under E01D (Construction OF Bridges, ; Elevated ROADWAYS; OR VIADUCTS; Assembly OF Bridges). Peak complete grant year is 2023 (2 grants) versus a trough of 1 in 2021. By volume, China sits between Chengdu Youyang Electromechanical Product Design Co., Ltd. and China United Network Communications Group Company Limited.

China's three-year grant acceleration

China Railway NO. 3 Engineering Group Co., Ltd. shows 3 grants in 2022–2024 against only 1 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.

Chengdu Youyang E…

6
China Academy OF…

6
China Automotive…

6
China National Di…

6
China Railway Tun…

6
China Three Gorge…

6
China Tobacco Hub…

6
China United Netw…

6
China Railway NO… ◀

6

What this shows China holds 6 patents at rank #39,368, 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 #39,368 in granted patent volume.

Leaders in E01D (Construction OF Bridges)

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)

40 Top 35% higher than 65% of 49,997 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

China Railway NO. 3 Engineering Group Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2021	1	16.7%
2022	1	16.7%
2023	2	33.3%
2025partial year	2	33.3%

Which technologies does China Railway NO. 3 Engineering Group Co., Ltd. patent most?

E01D - Construction OF Bridges, ; Elevated ROADWAYS; OR VIADUCTS; Assembly OF Bridges 2

B21F - Working OR Processing OF Metal Wire 1

B66C - CRANES; Load-engaging Elements OR Devices FOR Cranes, Capstans, Winches, OR Tackles 1

E21D - SHAFTS; TUNNELS; GALLERIES; Large Underground Chambers 1

G06F - Electric Digital Data Processing 1

B24B - Machines, Devices, OR Processes FOR Grinding OR Polishing ; Dressing OR Conditioning OF Abrading SURFACES; Feeding OF Grinding, Polishing, OR Lapping Agents 1

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 1

Top 7 of 7 technology areas

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

China Railway NO. 3 Engineering Group Co., Ltd.'s patent record in context - here's where to go next.

China Railway NO. 3 Engineering Group Co., Ltd.'s lead technology class is E01D (Construction OF Bridges, ; Elevated ROADWAYS; OR VIADUCTS; Assembly OF Bridges), 33.3% of its portfolio - see every assignee active in that class. Explore E01D
Ranked #39,441 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare China Railway NO. 3 Engineering Group Co., Ltd. against Chengdu Youyang Electromechanical Product Design Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 40.5/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

Figures reflect USPTO PatentsView grant data through May 2026; pending applications not yet granted are not counted.

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.