USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Nanjing Hydraulic Research Institute

USPTO PatentsView assignee record - 18 granted patents across 32 technology areas, active 2019–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: E02B (HYDRAULIC ENGINEERING).

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

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

6.6

Avg claims per patent

+1600%

5-year filing velocity

The verdict

Nanjing holds 18 US patents across 32 technology areas, rank #16,230 of 50,000 tracked assignees.

#16,230
of 50,000 US assignees by volume: Top 21%
by Innovation Score (46.4/100): 6.6
avg claims per patent: +1600%
filing velocity, last 5 yrs

Portfolio overview

Nanjing Hydraulic Research Institute has been granted 18 US utility patents between 2019 and 2025, placing Nanjing Hydraulic Research Institute at rank #16,230 across all assignees tracked by PlainPatent. This portfolio spans 32 distinct Cooperative Patent Classification (CPC) subclasses, averaging 6.6 claims per patent with primary concentration in E02B (HYDRAULIC ENGINEERING). As a Foreign Corporation, Nanjing Hydraulic Research Institute is one of the more focused assignees in the PatentsView dataset. By volume, Nanjing sits between Nuralogix Corporation (18 patents, rank #16,226) and National University Hospital (singapore) Pte Ltd (18 patents, rank #16,234) - the closest US assignees by grant volume. The composite Innovation Score of 46.4/100 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 17 grants, compared with 1 in the 2015–2019 window, a +1600% shift in five-year velocity. An acceleration of this magnitude signals aggressive R&D investment and expanding technical ambition. 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 Hydraulic Research Institute's 6.6 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 32 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Nanjing Hydraulic Research Institute against peers pursuing similar technology classes.

Nuralogix

18
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18
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18
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18
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18
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18
National Gypsum P…

18
National Universi…

18
Nanjing Hydraulic… ◀

18

What this shows Nanjing holds 18 patents at rank #16,230, 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 #16,230 in granted patent volume.

Leaders in E02B (Hydraulic Engineering)

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)

46 Top 21% higher than 79% 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 · 2019–2025

Grants by year

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

View data table

Nanjing Hydraulic Research Institute patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2019	1	5.6%
2020	4	22.2%
2021	1	5.6%
2023	6	33.3%
2024	5	27.8%
2025	1	5.6%

Which technologies does Nanjing Hydraulic Research Institute patent most?

E02B - HYDRAULIC ENGINEERING 6

Y02A - TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE 5

G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 4

C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 3

G01C - MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY 3

G01F - MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME 3

G01W - METEOROLOGY 2

E03B - INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER 2

A01K - ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS 2

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

A01B - SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL 1

A01G - HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING 1

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 1

E03F - SEWERS; CESSPOOLS 1

E02C - SHIP-LIFTING DEVICES OR MECHANISMS 1

Top 15 of 32 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Multi-domain

Claim Depth Simple

Velocity Accelerating

Where it ranks

Overall rank by patents

#16,230

Across all tracked assignees

Innovation Score

46.4 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 Hydraulic Research Institute hold?

Nanjing Hydraulic Research Institute holds 18 US granted patents filed between 2019 and 2025, spanning 32 technology areas.

What is Nanjing Hydraulic Research Institute's Innovation Score?

Nanjing Hydraulic Research Institute has an Innovation Score of 46.4 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 Hydraulic Research Institute focus on?

Nanjing Hydraulic Research Institute's top technology area is E02B (HYDRAULIC ENGINEERING) with 6 patents. The company has filed patents in 32 CPC subclasses total.

Is Nanjing Hydraulic Research Institute's patent filing rate increasing or decreasing?

Nanjing Hydraulic Research Institute's recent filing velocity is +1600% compared to the prior five-year period. This indicates accelerating innovation.

What does claim depth mean for Nanjing Hydraulic Research Institute's patents?

Nanjing Hydraulic Research Institute's patents average 6.6 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the Nanjing Hydraulic Research Institute 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 18 grants land it in the top 21% 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 #16,230 of 50,000. Top 50 holders
Most of this portfolio concentrates in E02B - see who else leads that technology area. E02B 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.