Where does Showa Denko K.K. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Showa Denko K.K. ranks #778 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 Showa Denko K.K. hold?

Showa Denko K.K. holds 589 US utility patents granted between 2015 and 2025, spanning 146 technology areas.

What is Showa Denko K.K.'s Innovation Score?

Showa Denko K.K. has an Innovation Score of 58.0 out of 100 (top 5% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Showa Denko K.K. focus on?

Showa Denko K.K.'s top technology area is Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution) with 108 patents, ranking #134 of 5,963 assignees active in that subclass. Grants appear in 146 CPC subclasses total.

Is Showa Denko K.K.'s patent grant rate increasing or decreasing?

Showa Denko K.K.'s recent grant velocity is -20% 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 Showa Denko K.K.'s patents?

Showa Denko K.K.'s patents average 10.7 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 Showa Denko K.K. 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

Showa Denko K.K.

USPTO PatentsView assignee record - 589 granted patents across 146 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: 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, Showa ranks #778 of 49,997 tracked US assignees by granted-patent volume, with 589 patents across 146 technology areas.

#778
of 49,997 US assignees by volume: Top 5%
by Innovation Score (58.0/100): 10.7
avg claims per patent: -20%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R778 · Foreign Corporation #778 · 589 grants

GRANTS-MID · TOP-DECILE · PHOTO-FINISH · CPC-WIDE · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-MID 589 grants
TOP-DECILE #778/49,997
PHOTO-FINISH Carnegie Mellon…
CPC-WIDE Y02E · 146 areas
INNOV-PAR 58.0/100
CLAIMS-PAR 10.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -20% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Carnegie Mellon University (±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 Showa’s 58.0 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 22.0 pts (38%) Velocity 4.5 pts (8%) Breadth 25.0 pts (43%) Claim depth 6.4 pts (11%)

Qualcomm Incorporated · highest

85
HLI Solutions · near

58
Mexichem Fluor DE C V · near

58
Panasonic Avionics · near

58
China Institute of… · near

58
Showa Denko K K · this assignee

58
3D Lighting… · lowest

7

What this shows Showa's Innovation Score is 58.0/100 (top 5% 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 Showa?

Each dot is one of Showa’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). Showa’s own 10.7 claims/patent is at or below the 13.6 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

How Showa's grant cadence moved

Between 2020–2024, Showa Denko K.K. received 262 grants versus 326 in 2015–2019 (-20% equal-window velocity, below median growth). Across complete PatentsView years, output peaked in 2015 at 88 grants and bottomed in 2024 at 3. Lead class Y02E accounts for 18.3% of the portfolio across 146 subclasses. Volume neighbours: Washington University (#774) and Phoenix Contact GMBH & Co. KG (#782).

Showa's three-year grant acceleration

From 2019–2021 to 2022–2024, Showa Denko K.K. moved from 180 to 122 grants (0.68x the prior three-year total, a multiple, not a CAGR). Among 3,296 tracked assignees with ≥100 grants and ≥20 prior-period grants, that multiple ranks #2,218. See the growth leaderboard.

Washington Univer…

594
Open Text

591
Baxter Healthcare

590
Carnegie Mellon U…

589
Tohoku University

589
Showa Denko K K ◀

589
Kyoto University

588
Kokusai Electric

587
Phoenix Contact &…

587

What this shows Showa holds 589 patents at rank #778, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Showa

By rank, the assignees closest to #778 in granted patent volume.

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

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Showa, neither rank-band nor same-CPC leaders (those blocks stay above). In Y02E (Reduction OF Greenhouse GAS [GHG] Emissions), Showa ranks #134 of 5,963 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (58 here).

China Institute of Water Resources and Hydropower Research 58 Panasonic Avionics Corporation 58 Mexichem Fluor S.A. DE C.V. 58 HLI Solutions, Inc. 58

Similar claim depth

Nearest assignees by average claims per patent (10.7 here).

Panasonic Intellectual Property Corporation of America 10.7 avg Fameccanica.Data S.p.A. 10.7 avg Daido Steel Co., Ltd. 10.7 avg Digitalglobe Inc 10.7 avg

Showa's Innovation Score vs. every tracked assignee

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

58 Top 5% higher than 95% 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 · 2015–2025

Grants by year

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

View data table

Showa Denko K.K. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	88	14.9%
2016	79	13.4%
2017	64	10.9%
2018	55	9.3%
2019	40	6.8%
2020	61	10.4%
2021	79	13.4%
2022	71	12.1%
2023	48	8.1%
2024	3	0.5%
2025partial year	1	0.2%

Which technologies does Showa Denko K.K. patent most?

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 108

G11B - Information Storage Based ON Relative Movement Between Record Carrier AND Transducer 103

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 102

C30B - Single-crystal Growth ; Unidirectional Solidification OF Eutectic Material OR Unidirectional Demixing OF Eutectoid MATERIAL; Refining BY Zone-melting OF Material ; Production OF A Homogeneous Polycrystalline Material With Defined Structure ; Single Crystals OR Homogeneous Polycrystalline Material WI 86

H01L - Semiconductor Devices NOT Covered BY Class H10 83

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 60

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 56

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 50

C07C - Acyclic OR Carbocyclic Compounds 47

H01G - CAPACITORS; Capacitors, Rectifiers, Detectors, Switching Devices, Light-sensitive OR Temperature-sensitive Devices OF THE Electrolytic Type 42

C08G - Macromolecular Compounds Obtained Otherwise Than BY Reactions Only Involving Unsaturated Carbon-to-carbon Bonds 41

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 37

C08F - Macromolecular Compounds Obtained BY Reactions Only Involving Carbon-to-carbon Unsaturated Bonds 37

Y10T - Technical Subjects Covered BY Former US Classification 32

C22C - Alloys 30

Top 15 of 146 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

Showa Denko K.K.'s patent record in context - here's where to go next.

Showa Denko K.K.'s lead technology class is Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution), 18.3% of its portfolio - see every assignee active in that class. Explore Y02E
Ranked #778 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Showa Denko K.K. against Washington University, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 58.0/100 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.