USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Nanjing Institute OF Railway Technology

USPTO PatentsView assignee record - 6 granted patents across 11 technology areas, active 2021–2023. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: Y02T (CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION).

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

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

10.8

Avg claims per patent

5-year filing velocity

The verdict

Nanjing holds 6 US patents across 11 technology areas, rank #41,813 of 50,000 tracked assignees.

#41,813
of 50,000 US assignees by volume: Top 62%
by Innovation Score (31.6/100): 10.8
avg claims per patent

Portfolio overview

Nanjing Institute OF Railway Technology has been granted 6 US utility patents between 2021 and 2023, placing Nanjing Institute OF Railway Technology at rank #41,813 across all assignees tracked by PlainPatent. This portfolio spans 11 distinct Cooperative Patent Classification (CPC) subclasses, averaging 10.8 claims per patent with primary concentration in Y02T (CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION). As a Foreign Corporation, Nanjing Institute OF Railway Technology is one of the more focused assignees in the PatentsView dataset. By volume, Nanjing sits between Nabel Co., Ltd. (6 patents, rank #41,809) and Nanning CITY HONG CAI Illuminations Technology Company Limited (6 patents, rank #41,817) - the closest US assignees by grant volume. The composite Innovation Score of 31.6/100 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 2023, with 6 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. Nanjing Institute OF Railway Technology's 10.8 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while concentration in 11 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Nanjing Institute OF Railway Technology against peers pursuing similar technology classes.

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What this shows Nanjing holds 6 patents at rank #41,813, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Nanjing

By rank, the assignees closest to #41,813 in granted patent volume.

Leaders in Y02T (Climate Change Mitigation Technologies Related TO Transpo…)

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

Nanjing's Innovation Score vs. every tracked assignee

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

32 Top 62% higher than 38% 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 · 2021–2023

Grants by year

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

View data table

Nanjing Institute OF Railway Technology patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2021	3	50.0%
2022	2	33.3%
2023	1	16.7%

Which technologies does Nanjing Institute OF Railway Technology patent most?

Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION 2

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 2

G06F - ELECTRIC DIGITAL DATA PROCESSING 2

H04L - TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 2

G01R - MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1

B61L - GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC 1

G08B - SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS 1

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 1

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 1

B60M - POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES 1

G08C - TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS 1

Top 11 of 11 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Focused

Claim Depth Simple

Where it ranks

Overall rank by patents

#41,813

Across all tracked assignees

Innovation Score

31.6 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 Nanjing Institute OF Railway Technology hold?

Nanjing Institute OF Railway Technology holds 6 US granted patents filed between 2021 and 2023, spanning 11 technology areas.

What is Nanjing Institute OF Railway Technology's Innovation Score?

Nanjing Institute OF Railway Technology has an Innovation Score of 31.6 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Nanjing Institute OF Railway Technology focus on?

Nanjing Institute OF Railway Technology's top technology area is Y02T (CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION) with 2 patents. The company has filed patents in 11 CPC subclasses total.

Is Nanjing Institute OF Railway Technology's patent filing rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for Nanjing Institute OF Railway Technology.

What does claim depth mean for Nanjing Institute OF Railway Technology's patents?

Nanjing Institute OF Railway Technology's patents average 10.8 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the Nanjing Institute OF Railway Technology 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

Nanjing's 6 grants land it in the top 62% 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 - Nanjing ranks #41,813 of 50,000. Top 50 holders
Most of this portfolio concentrates in Y02T - see who else leads that technology area. Y02T 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.