Where does Chugai RO Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Chugai RO Co., Ltd. ranks #20,925 of 50,000 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Chugai RO Co., Ltd. hold?

Chugai RO Co., Ltd. holds 13 US utility patents granted between 2015 and 2025, spanning 21 technology areas.

What is Chugai RO Co., Ltd.'s Innovation Score?

Chugai RO Co., Ltd. has an Innovation Score of 29.9 out of 100 (top 68% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Chugai RO Co., Ltd.'s patent grant rate increasing or decreasing?

Chugai RO Co., Ltd.'s recent grant velocity is +40% compared to the prior five-year period (grant years, not application filing dates). The company is maintaining or growing its granted-patent output.

What does claim depth mean for Chugai RO Co., Ltd.'s patents?

Chugai RO Co., Ltd.'s patents average 7.7 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 Chugai RO 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 2015–2025 USPTO PatentsView Foreign Corporation

Chugai RO Co., Ltd.

Q: What technology areas does Chugai RO Co., Ltd. focus on?

Chugai RO Co., Ltd.'s top technology area is F27D (DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE) with 6 patents. Grants appear in 21 CPC subclasses total.

USPTO PatentsView assignee record - 13 granted patents across 21 technology areas, recorded in grant years 2015–2025. 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: F27D (DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE).

Compiled by PlainPatent · May 15, 2026

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Chugai ranks #20,925 of 50,000 tracked US assignees by granted-patent volume, with 13 patents across 21 technology areas.

#20,925
of 50,000 US assignees by volume: Top 68%
by Innovation Score (29.9/100): 7.7
avg claims per patent: +40%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R20925 · Foreign Corporation #20,925 · 13 grants

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

GRANTS-MICRO 13 grants
MID-PACK #20,925/50,000
PHOTO-FINISH CHISWICK INNOVATIONS
CPC-FOCUS F27D · 21 areas
INNOV-THIN 29.9/100
CLAIMS-SPARSE 7.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-UP +40% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Chiswick Innovations Limited (±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
Chugai RO · this assignee

30
3D Lighting Innovati… · lowest

7

What this shows Chugai's Innovation Score is 29.9/100 (top 68% 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 Chugai's grants concentrate

Chugai RO Co., Ltd. is a focused PatentsView assignee: 21 CPC subclasses with 46.2% of grants classified under F27D (DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE). Peak complete grant year is 2020 (5 grants) versus a trough of 1 in 2015. By volume, Chugai sits between Chiswick Innovations Limited and Civco Medical Instruments Co., Inc..

Chiswick Innovati…

13
Chongqing Richlan…

13
Chordate Medical…

13
Chubu University…

13
CI Systems (Israe…

13
Cibus Europe B V

13
Cirocomm Technolo…

13
Civco Medical Ins…

13
Chugai RO ◀

13

What this shows Chugai holds 13 patents at rank #20,904, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Chugai

By rank, the assignees closest to #20,904 in granted patent volume.

Leaders in F27D (Details OR Accessories OF Furnaces)

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

Chugai's Innovation Score vs. every tracked assignee

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

30 Top 68% higher than 32% 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 · 2015–2025

Grants by year

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

View data table

Chugai RO Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	7.7%
2017	3	23.1%
2018	1	7.7%
2020	5	38.5%
2021	2	15.4%
2025partial year	1	7.7%

Which technologies does Chugai RO Co., Ltd. patent most?

F27D - DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE 6

F27B - FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS 5

F23D - BURNERS 5

F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN ; A CARRIER GAS OR; AIR 4

C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING 3

C23C - COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL 2

H05H - PLASMA TECHNIQUE ; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS 2

H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS 2

B65G - TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS 1

F26B - DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM 1

B65H - HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES 1

B05C - APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL 1

B05D - PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL 1

H01L - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10 1

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

Top 15 of 21 technology areas

Where it ranks

Overall rank by patents

#20,925

of 50,000 tracked assignees

Innovation Score

29.9 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

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.