USPTO 2015–2025 USPTO PatentsView Foreign Corporation

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

USPTO PatentsView assignee record - 33 granted patents across 42 technology areas, active 2016–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. 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 byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

11.8

Avg claims per patent

-26%

5-year filing velocity

The verdict

CRRC holds 33 US patents across 42 technology areas, rank #9,471 of 50,000 tracked assignees.

#9,471
of 50,000 US assignees by volume: Top 28%
by Innovation Score (43.5/100): 11.8
avg claims per patent: -26%
filing velocity, last 5 yrs

Portfolio overview

CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd. has been granted 33 US utility patents between 2016 and 2025, placing CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd. at rank #9,471 across all assignees tracked by PlainPatent. This portfolio spans 42 distinct Cooperative Patent Classification (CPC) subclasses, averaging 11.8 claims per patent with primary concentration in 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). As a Foreign Corporation, CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, CRRC sits between CELL Signaling Technology, Inc. (33 patents, rank #9,467) and Commscope Asia Holdings B.v. (33 patents, rank #9,475) - the closest US assignees by grant volume. The composite Innovation Score of 43.5/100 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. Between 2020 and 2025 the company received 14 grants, compared with 19 in the 2015–2019 window, a -26% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. 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. CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd.'s 11.8 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 42 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd. against peers pursuing similar technology classes.

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.

CRRC's Innovation Score vs. every tracked assignee

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

44 Top 28% higher than 72% 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 · 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%
2025	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

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Multi-domain

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#9,471

Across all 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?

Frequently Asked Questions

How many patents does CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd. hold?

CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd. holds 33 US granted patents filed between 2016 and 2025, spanning 42 technology areas.

What is CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd.'s Innovation Score?

CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd. has an Innovation Score of 43.5 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd. focus on?

CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd.'s top technology area 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 MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES) with 6 patents. The company has filed patents in 42 CPC subclasses total.

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

CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd.'s recent filing velocity is -26% compared to the prior five-year period. Filing 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 relatively simple claim structure, typical for focused inventions.

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.

How to use this portfolio

CRRC's 33 grants land it in the top 28% 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 - CRRC ranks #9,471 of 50,000. Top 50 holders
Most of this portfolio concentrates in B60T - see who else leads that technology area. B60T 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.