Where does Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd. ranks #9,477 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

Is Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd.'s patent grant rate increasing or decreasing?

Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd.'s recent grant velocity is -32% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

What does claim depth mean for Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd.'s patents?

Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd.'s patents average 11.8 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

Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd.

Q: How is the Crrc Qingdao Sifang Rolling Stock Research Institute 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 - 33 granted patents across 42 technology areas, recorded in grant years 2016–2025. 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: B60T (Vehicle Brake Control Systems OR Parts THEREOF; Brake Control Systems OR Parts Thereof, IN General ; Arrangement OF Braking Elements ON Vehicles IN GENERAL; Portable Devices FOR Preventing Unwanted MO).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Crrc ranks #9,477 of 49,997 tracked US assignees by granted-patent volume, with 33 patents across 42 technology areas.

#9,477
of 49,997 US assignees by volume: Top 28%
by Innovation Score (43.5/100): 11.8
avg claims per patent: -32%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R9477 · Foreign Corporation #9,477 · 33 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-WIDE · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-SMALL 33 grants
UPPER-Q #9,477/49,997
PHOTO-FINISH Calera
CPC-WIDE B60T · 42 areas
INNOV-PAR 43.5/100
CLAIMS-PAR 11.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -32% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Calera Corporation (±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
Constellation Designs · near

44
Crrc Qingdao Sifang… · this assignee

44
Eaglepicher · near

44
Generalplus Technology · near

44
Maxcyte · near

44
3D Lighting… · lowest

7

What this shows Crrc's Innovation Score is 43.5/100 (top 28% 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 Crrc's grants concentrate

Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd. is a focused PatentsView assignee: 42 CPC subclasses with 18.2% of grants classified under B60T (Vehicle Brake Control Systems OR Parts THEREOF; Brake Control Systems OR Parts Thereof, IN General ; Arrangement OF Braking Elements ON Vehicles IN GENERAL; Portable Devices FOR Preventing Unwanted MO). Peak complete grant year is 2017 (7 grants) versus a trough of 1 in 2016. By volume, Crrc sits between Cell Signaling Technology, Inc. and CommScope Asia Holdings B.V..

Crrc's three-year grant acceleration

Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd. shows 3 grants in 2022–2024 against only 15 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.

Cell Signaling Te…

33
Center FOR Advanc…

33
Clexio Biosciences

33
Crimson Consulting

33
Calera

33
Clover Group

33
Coldsnap

33
Commscope Asia Ho…

33
Crrc Qingdao Sifa… ◀

33

What this shows Crrc holds 33 patents at rank #9,471, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Crrc

By rank, the assignees closest to #9,471 in granted patent volume.

Leaders in B60T (Vehicle Brake Control Systems OR Parts Thereof)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Crrc, neither rank-band nor same-CPC leaders (those blocks stay above).

Similar innovation score

Nearest assignees by Innovation Score (44 here).

Generalplus Technology Inc. 44 Maxcyte, Inc. 44 Constellation Designs, LLC 44 Eaglepicher Technologies, LLC 44

Crrc's Innovation Score vs. every tracked assignee

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

44 Top 28% higher than 72% 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 · 2016–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2016–2019 baseline. Full figures in the table below.

View data table

Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	1	3.0%
2017	7	21.2%
2018	6	18.2%
2019	5	15.2%
2020	3	9.1%
2021	7	21.2%
2022	2	6.1%
2023	1	3.0%
2025partial year	1	3.0%

Which technologies does Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd. patent most?

B60T - Vehicle Brake Control Systems OR Parts THEREOF; Brake Control Systems OR Parts Thereof, IN General ; Arrangement OF Braking Elements ON Vehicles IN GENERAL; Portable Devices FOR Preventing Unwanted Movement OF VEHICLES; Vehicle Modifications TO Facilitate Cooling OF Brakes 6

B61G - COUPLINGS; Draught AND Buffing Appliances 6

H02J - Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy 6

B60L - Propulsion OF Electrically-propelled Vehicles ; Supplying Electric Power FOR Auxiliary Equipment OF Electrically-propelled Vehicles ; Electrodynamic Brake Systems FOR Vehicles IN General ; Magnetic Suspension OR Levitation FOR VEHICLES; Monitoring Operating Variables OF Electrically-propelled Vehicl 5

H04L - Transmission OF Digital Information, e.g. Telegraphic Communication 5

B61H - Brakes OR Other Retarding Devices Specially Adapted FOR Rail VEHICLES; Arrangement OR Disposition Thereof IN Rail Vehicles 5

B61L - Guiding Railway TRAFFIC; Ensuring THE Safety OF Railway Traffic 4

Y02T - Climate Change Mitigation Technologies Related TO Transportation 4

H02M - Apparatus FOR Conversion Between AC AND AC, Between AC AND DC, OR Between DC AND DC, AND FOR USE With Mains OR Similar Power Supply SYSTEMS; Conversion OF DC OR AC Input Power Into Surge Output POWER; Control OR Regulation Thereof 4

G01M - Testing Static OR Dynamic Balance OF Machines OR STRUCTURES; Testing OF Structures OR Apparatus, NOT Otherwise Provided FOR 3

G05B - Control OR Regulating Systems IN GENERAL; Functional Elements OF Such SYSTEMS; Monitoring OR Testing Arrangements FOR Such Systems OR Elements 3

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 3

H04W - Wireless Communication Networks 2

Y04S - Systems Integrating Technologies Related TO Power Network Operation, Communication OR Information Technologies FOR Improving THE Electrical Power Generation, Transmission, Distribution, Management OR Usage, i.e. Smart Grids 2

G06F - Electric Digital Data Processing 2

Top 15 of 42 technology areas

Where it ranks

Overall rank by patents

#9,477

of 49,997 tracked assignees

Innovation Score

43.5 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

What to do with this data

Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd.'s patent record in context - here's where to go next.

Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd.'s lead technology class is B60T (Vehicle Brake Control Systems OR Parts THEREOF; Brake Control Systems OR Parts Thereof, IN General ; Arrangement OF Braking Elements ON Vehicles IN GENERAL; Portable Devices FOR Preventing Unwanted MO), 18.2% of its portfolio - see every assignee active in that class. Explore B60T
Ranked #9,477 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd. against Cell Signaling Technology, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 43.5/100 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.