Where does Nippon Steel & Sumikin Hardfacing Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Nippon Steel & Sumikin Hardfacing Co., Ltd. ranks #41,985 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 Nippon Steel & Sumikin Hardfacing Co., Ltd. hold?

Nippon Steel & Sumikin Hardfacing Co., Ltd. holds 6 US utility patents granted between 2016 and 2022, spanning 12 technology areas.

What is Nippon Steel & Sumikin Hardfacing Co., Ltd.'s Innovation Score?

Nippon Steel & Sumikin Hardfacing Co., Ltd. has an Innovation Score of 26.4 out of 100 (20th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Nippon Steel & Sumikin Hardfacing Co., Ltd.'s patent grant rate increasing or decreasing?

Nippon Steel & Sumikin Hardfacing Co., 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 Nippon Steel & Sumikin Hardfacing Co., Ltd.'s patents?

Nippon Steel & Sumikin Hardfacing Co., Ltd.'s patents average 6.8 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 Nippon Steel & Sumikin Hardfacing 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

Nippon Steel & Sumikin Hardfacing Co., Ltd.

Q: What technology areas does Nippon Steel & Sumikin Hardfacing Co., Ltd. focus on?

Nippon Steel & Sumikin Hardfacing Co., Ltd.'s top technology area is 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) with 6 patents. Grants appear in 12 CPC subclasses total.

USPTO PatentsView assignee record - 6 granted patents across 12 technology areas, recorded in grant years 2016–2022. 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: 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 Evap).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Nippon ranks #41,985 of 49,997 tracked US assignees by granted-patent volume, with 6 patents across 12 technology areas.

#41,985
of 49,997 US assignees by volume: 20th percentile
by Innovation Score (26.4/100): 6.8
avg claims per patent: -50%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R41985 · Foreign Corporation #41,985 · 6 grants

GRANTS-MICRO · LOWER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 6 grants
LOWER-Q #41,985/49,997
PHOTO-FINISH Ningbo Tianqi…
CPC-FOCUS C23C · 12 areas
INNOV-THIN 26.4/100
CLAIMS-SPARSE 6.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -50% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Ningbo Tianqi Intelligent Technology Co., Ltd. (±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
Nippon Steel &… · this assignee

26
3D Lighting… · lowest

7

What this shows Nippon's Innovation Score is 26.4/100 (20th 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.

Where Nippon's grants concentrate

Nippon Steel & Sumikin Hardfacing Co., Ltd. is a focused PatentsView assignee: 12 CPC subclasses with 100% of grants classified under 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 Evap). Peak complete grant year is 2018 (2 grants) versus a trough of 1 in 2016. By volume, Nippon sits between Ningbo Tianqi Intelligent Technology Co., Ltd. and Nitto Kogyo Corporation.

Nippon's three-year grant acceleration

Nippon Steel & Sumikin Hardfacing Co., Ltd. shows 1 grants in 2022–2024 against only 2 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.

Ningbo Tianqi Int…

6
Nippoh Chemicals

6
Nippon Control Sy…

6
Nippon Kasei Chem…

6
Nirec

6
Nissan Jidosha

6
NIT Docomo

6
Nitto Kogyo

6
Nippon Steel & Su… ◀

6

What this shows Nippon holds 6 patents at rank #41,883, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Nippon

By rank, the assignees closest to #41,883 in granted patent volume.

Leaders in C23C (Coating Metallic Material)

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

Nippon's Innovation Score vs. every tracked assignee

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

26 20th percentile higher than 20% 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 · 2016–2022

Grants by year

Teal-shaded recent years (2020–present) versus the 2016–2019 baseline. Full figures in the table below.

View data table

Nippon Steel & Sumikin Hardfacing Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	1	16.7%
2018	2	33.3%
2019	1	16.7%
2020	1	16.7%
2022	1	16.7%

Which technologies does Nippon Steel & Sumikin Hardfacing Co., Ltd. patent most?

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 6

B21B - Rolling OF Metal 2

C22C - Alloys 2

B21C - Manufacture OF Metal Sheets, Wire, Rods, Tubes, Profiles OR Like Semi-manufactured Products Otherwise Than BY ROLLING; Auxiliary Operations Used IN Connection With Metal-working Without Essentially Removing Material 2

C03C - Chemical Composition OF Glasses, Glazes OR Vitreous ENAMELS; Surface Treatment OF GLASS; Surface Treatment OF Fibres OR Filaments Made From Glass, Minerals OR SLAGS; Joining Glass TO Glass OR Other Materials 1

B05D - Processes FOR Applying Fluent Materials TO Surfaces, IN General 1

Y10T - Technical Subjects Covered BY Former US Classification 1

B65H - Handling Thin OR Filamentary Material, e.g. Sheets, Webs, Cables 1

B23K - Soldering OR UNSOLDERING; WELDING; Cladding OR Plating BY Soldering OR WELDING; Cutting BY Applying Heat Locally, e.g. Flame CUTTING; Working BY Laser Beam 1

B32B - Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form 1

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 1

F16C - SHAFTS; Flexible SHAFTS; Elements OR Crankshaft MECHANISMS; Rotary Bodies Other Than Gearing ELEMENTS; Bearings 1

Top 12 of 12 technology areas

Where it ranks

Overall rank by patents

#41,985

of 49,997 tracked assignees

Innovation Score

26.4 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

What to do with this data

Nippon Steel & Sumikin Hardfacing Co., Ltd.'s patent record in context - here's where to go next.

Nippon Steel & Sumikin Hardfacing Co., Ltd.'s lead technology class is 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 Evap), 100% of its portfolio - see every assignee active in that class. Explore C23C
Ranked #41,985 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Nippon Steel & Sumikin Hardfacing Co., Ltd. against Ningbo Tianqi Intelligent Technology Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 26.4/100 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.