Where does Nippon Carbon Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Nippon Carbon Co., Ltd. ranks #49,129 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 Carbon Co., Ltd. hold?

Nippon Carbon Co., Ltd. holds 5 US utility patents granted between 2016 and 2022, spanning 9 technology areas.

What is Nippon Carbon Co., Ltd.'s Innovation Score?

Nippon Carbon Co., Ltd. has an Innovation Score of 23.0 out of 100 (11th 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 Nippon Carbon Co., Ltd. focus on?

Nippon Carbon Co., Ltd.'s top technology area is Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution) with 4 patents, ranking #2,537 of 5,963 assignees active in that subclass. Grants appear in 9 CPC subclasses total.

Is Nippon Carbon Co., Ltd.'s patent grant rate increasing or decreasing?

Nippon Carbon Co., Ltd.'s recent grant velocity is -33% 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 Carbon Co., Ltd.'s patents?

Nippon Carbon Co., Ltd.'s patents average 4.8 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 Carbon 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 Carbon Co., Ltd.

USPTO PatentsView assignee record - 5 granted patents across 9 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: Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Nippon ranks #49,129 of 49,997 tracked US assignees by granted-patent volume, with 5 patents across 9 technology areas.

#49,129
of 49,997 US assignees by volume: 11th percentile
by Innovation Score (23.0/100): 4.8
avg claims per patent: -33%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R49129 · Foreign Corporation #49,129 · 5 grants

GRANTS-MICRO · BOTTOM-DECILE · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-MICRO 5 grants
BOTTOM-DECILE #49,129/49,997
PHOTO-FINISH Ningbo Xinkaihong…
CPC-NARROW Y02E · 9 areas
INNOV-THIN 23.0/100
CLAIMS-SPARSE 4.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -33% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Ningbo Xinkaihong Machine Fabricate 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.

How Nippon’s 23.0 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 6.2 pts (27%) Velocity 3.3 pts (14%) Breadth 10.6 pts (46%) Claim depth 2.9 pts (13%)

Qualcomm Incorporated · highest

85
Nippon Carbon · this assignee

23
3D Lighting… · lowest

7

What this shows Nippon's Innovation Score is 23.0/100 (11th 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 Nippon?

Each dot is one of Nippon’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). Nippon’s own 4.8 claims/patent is at or below the 6.0 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Nippon's grants concentrate

Nippon Carbon Co., Ltd. is a focused PatentsView assignee: 9 CPC subclasses with 80% of grants classified under Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution). By volume, Nippon sits between Ningbo Xinkaihong Machine Fabricate Co., Ltd and Nippon Paper Papylia Co., Ltd..

Nippon's three-year grant acceleration

Nippon Carbon 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 Xinkaihong…

5
Ninghai ARK Commo…

5
Ninjawav

5
Nintex PTY

5
Nippon Gasket

5
Nippon Leakless I…

5
Nippon OIL Pump

5
Nippon Paper Papy…

5
Nippon Carbon ◀

5

What this shows Nippon holds 5 patents at rank #49,037, 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 #49,037 in granted patent volume.

Leaders in Y02E (Reduction OF Greenhouse GAS [GHG] Emissions)

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)

23 11th percentile higher than 11% 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 Carbon Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	1	20.0%
2018	1	20.0%
2019	1	20.0%
2021	1	20.0%
2022	1	20.0%

Which technologies does Nippon Carbon Co., Ltd. patent most?

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 4

Y02T - Climate Change Mitigation Technologies Related TO Transportation 4

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 4

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 3

Y10T - Technical Subjects Covered BY Former US Classification 3

F16J - Pistons ; CYLINDERS; Sealings 1

F16K - VALVES; TAPS; COCKS; ACTUATING-FLOATS; Devices FOR Venting OR Aerating 1

H01G - CAPACITORS; Capacitors, Rectifiers, Detectors, Switching Devices, Light-sensitive OR Temperature-sensitive Devices OF THE Electrolytic Type 1

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 1

Top 9 of 9 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

Nippon Carbon Co., Ltd.'s patent record in context - here's where to go next.

Nippon Carbon Co., Ltd.'s lead technology class is Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution), 80% of its portfolio - see every assignee active in that class. Explore Y02E
Ranked #49,129 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Nippon Carbon Co., Ltd. against Ningbo Xinkaihong Machine Fabricate Co., Ltd, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 23.0/100 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.