Where does Hydro International Ltd rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Hydro International Ltd ranks #18,740 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 Hydro International Ltd hold?

Hydro International Ltd holds 15 US utility patents granted between 2015 and 2023, spanning 13 technology areas.

What is Hydro International Ltd's Innovation Score?

Hydro International Ltd has an Innovation Score of 34.7 out of 100 (48th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Hydro International Ltd focus on?

Hydro International Ltd's top technology area is E03F (SEWERS; Cesspools) with 9 patents, ranking #16 of 178 assignees active in that subclass. Grants appear in 13 CPC subclasses total.

Is Hydro International Ltd's patent grant rate increasing or decreasing?

Hydro International Ltd's recent grant velocity is -50% 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 Hydro International Ltd's patents?

Hydro International Ltd's patents average 16.9 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.

How is the Hydro International 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 2015–2025 USPTO PatentsView Foreign Corporation

Hydro International Ltd

USPTO PatentsView assignee record - 15 granted patents across 13 technology areas, recorded in grant years 2015–2023. 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: E03F (SEWERS; Cesspools).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Hydro ranks #18,740 of 49,997 tracked US assignees by granted-patent volume, with 15 patents across 13 technology areas.

#18,740
of 49,997 US assignees by volume: 48th percentile
by Innovation Score (34.7/100): 16.9
avg claims per patent: -50%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R18740 · Foreign Corporation #18,740 · 15 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-RICH · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 15 grants
MID-PACK #18,740/49,997
PHOTO-FINISH Houghton Mifflin…
CPC-FOCUS E03F · 13 areas
INNOV-THIN 34.7/100
CLAIMS-RICH 16.9 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -50% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Houghton Mifflin Harcourt Publishing Company (±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 Hydro’s 34.7 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 9.6 pts (28%) Velocity 2.2 pts (6%) Breadth 12.7 pts (37%) Claim depth 10.1 pts (29%)

Qualcomm Incorporated · highest

85
Freudenberg Medical · near

35
BTL Medical s r o · near

35
Hydro International · this assignee

35
Kokuyo · near

35
Runway Blue · near

35
3D Lighting… · lowest

7

What this shows Hydro's Innovation Score is 34.7/100 (48th percentile 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 Hydro?

Each dot is one of Hydro’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). Hydro’s own 16.9 claims/patent is ABOVE the 9.8 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Hydro's grants concentrate

Hydro International Ltd is a focused PatentsView assignee: 13 CPC subclasses with 60% of grants classified under E03F (SEWERS; Cesspools). Peak complete grant year is 2017 (3 grants) versus a trough of 1 in 2016. By volume, Hydro sits between Houghton Mifflin Harcourt Publishing Company and Icon Vehicle Dynamics LLC.

Hydro's three-year grant acceleration

Hydro International Ltd shows 2 grants in 2022–2024 against only 6 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.

Houghton Mifflin…

15
House of Design

15
Hubbardton Forge

15
Hunting Energy Se…

15
I MER

15
I D Systems

15
IAM Robotics

15
Icon Vehicle Dyna…

15
Hydro Internation… ◀

15

What this shows Hydro holds 15 patents at rank #18,739, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Hydro

By rank, the assignees closest to #18,739 in granted patent volume.

Leaders in E03F (Sewers)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Hydro, neither rank-band nor same-CPC leaders (those blocks stay above). In E03F (Sewers), Hydro ranks #16 of 178 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (35 here).

BTL Medical Technologies s.r.o. 35 Kokuyo Co., Ltd. 35 Runway Blue, LLC 35 Freudenberg Medical, LLC 35

Hydro's Innovation Score vs. every tracked assignee

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

35 48th percentile higher than 48% 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 · 2015–2023

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Hydro International Ltd patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	13.3%
2016	1	6.7%
2017	3	20.0%
2018	1	6.7%
2019	3	20.0%
2020	2	13.3%
2021	1	6.7%
2022	1	6.7%
2023	1	6.7%

Which technologies does Hydro International Ltd patent most?

E03F - SEWERS; Cesspools 9

B01D - Separation 7

C02F - Treatment OF Water, Waste Water, Sewage, OR Sludge 6

Y10T - Technical Subjects Covered BY Former US Classification 5

F15D - Fluid Dynamics, i.e. Methods OR Means FOR Influencing THE Flow OF Gases OR Liquids 3

E03B - Installations OR Methods FOR Obtaining, Collecting, OR Distributing Water 3

E04D - Roof COVERINGS; SKY-LIGHTS; GUTTERS; Roof-working Tools 3

F16L - PIPES; Joints OR Fittings FOR PIPES; Supports FOR Pipes, Cables OR Protective TUBING; Means FOR Thermal Insulation IN General 3

Y02A - Technologies FOR Adaptation TO Climate Change 2

Y02W - Climate Change Mitigation Technologies Related TO Wastewater Treatment OR Waste Management 1

G05D - Systems FOR Controlling OR Regulating Non-electric Variables 1

A01G - HORTICULTURE; Cultivation OF Vegetables, Flowers, Rice, Fruit, Vines, Hops OR SEAWEED; FORESTRY; Watering 1

B29C - Shaping OR Joining OF PLASTICS; Shaping OF Material IN A Plastic State, NOT Otherwise Provided FOR; After-treatment OF THE Shaped Products, e.g. Repairing 1

Top 13 of 13 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

Hydro International Ltd's patent record in context - here's where to go next.

Hydro International Ltd's lead technology class is E03F (SEWERS; Cesspools), 60% of its portfolio - see every assignee active in that class. Explore E03F
Ranked #18,740 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Hydro International Ltd against Houghton Mifflin Harcourt Publishing Company, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 34.7/100 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.