Where does FDK Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), FDK Corporation ranks #2,990 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 FDK Corporation hold?

FDK Corporation holds 127 US utility patents granted between 2015 and 2025, spanning 34 technology areas.

What is FDK Corporation's Innovation Score?

FDK Corporation has an Innovation Score of 45.5 out of 100 (top 23% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does FDK Corporation focus on?

FDK Corporation's top technology area is H01M (Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy) with 90 patents, ranking #77 of 2,332 assignees active in that subclass. Grants appear in 34 CPC subclasses total.

Is FDK Corporation's patent grant rate increasing or decreasing?

FDK Corporation's recent grant velocity is +13% 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 FDK Corporation's patents?

FDK Corporation's patents average 5.5 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 FDK Corporation 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

FDK Corporation

USPTO PatentsView assignee record - 127 granted patents across 34 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: H01M (Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, FDK ranks #2,990 of 49,997 tracked US assignees by granted-patent volume, with 127 patents across 34 technology areas.

#2,990
of 49,997 US assignees by volume: Top 23%
by Innovation Score (45.5/100): 5.5
avg claims per patent: +13%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R2990 · Foreign Corporation #2,990 · 127 grants

GRANTS-MID · TOP-DECILE · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-UP · BOOK-FULL

GRANTS-MID 127 grants
TOP-DECILE #2,990/49,997
PHOTO-FINISH Centre National…
CPC-FOCUS H01M · 34 areas
INNOV-PAR 45.5/100
CLAIMS-SPARSE 5.5 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-UP +13% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Centre National d'Études Spatiales (±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 FDK’s 45.5 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 16.8 pts (37%) Velocity 4.9 pts (11%) Breadth 20.6 pts (45%) Claim depth 3.3 pts (7%)

Qualcomm Incorporated · highest

85
Advanced Ion Beam… · near

46
Computime · near

46
FDK · this assignee

46
iRhythm · near

46
Shenzhen Capchem… · near

46
3D Lighting… · lowest

7

What this shows FDK's Innovation Score is 45.5/100 (top 23% 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 FDK?

Each dot is one of FDK’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). FDK’s own 5.5 claims/patent is at or below the 15.7 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where FDK's grants concentrate

FDK Corporation is a focused PatentsView assignee: 34 CPC subclasses with 70.9% of grants classified under H01M (Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy). Peak complete grant year is 2019 (21 grants) versus a trough of 4 in 2015. By volume, FDK sits between Centre National d'Études Spatiales and Tecan Trading AG.

FDK's three-year grant acceleration

From 2019–2021 to 2022–2024, FDK Corporation moved from 48 to 35 grants (0.73x 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 #2,061. See the growth leaderboard.

Centre National d…

127
Corning Cable Sys…

127
Dana Canada

127
Ecolink Intellige…

127
Kuka Deutschland

127
Kulite Semiconduc…

127
Taiho Kogyo

127
Tecan Trading

127
FDK ◀

127

What this shows FDK holds 127 patents at rank #2,990, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near FDK

By rank, the assignees closest to #2,990 in granted patent volume.

Leaders in H01M (Processes OR Means)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for FDK, neither rank-band nor same-CPC leaders (those blocks stay above). In H01M (Processes OR Means), FDK ranks #77 of 2,332 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (46 here).

iRhythm Technologies, Inc. 46 Computime Limited 46 Advanced Ion Beam Technology, Inc. 46 Shenzhen Capchem Technology Co., Ltd. 46

Similar claim depth

Nearest assignees by average claims per patent (5.5 here).

Gauthier Biomedical, Inc 5.5 avg Ninebot (BEIJING) Tech Co., Ltd. 5.5 avg Hyper Ice, Inc. 5.5 avg ZEDEL 5.4 avg

FDK's Innovation Score vs. every tracked assignee

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

46 Top 23% higher than 77% 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

FDK Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	4	3.1%
2016	8	6.3%
2017	8	6.3%
2018	14	11.0%
2019	21	16.5%
2020	15	11.8%
2021	12	9.4%
2022	14	11.0%
2023	7	5.5%
2024	14	11.0%
2025partial year	10	7.9%

Which technologies does FDK Corporation patent most?

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 90

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 86

H02J - Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy 31

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 22

H02M - Apparatus FOR Conversion Between AC AND AC, Between AC AND DC, OR Between DC AND DC, AND FOR USE With Mains OR Similar Power Supply SYSTEMS; Conversion OF DC OR AC Input Power Into Surge Output POWER; Control OR Regulation Thereof 15

G01R - Measuring Electric VARIABLES; Measuring Magnetic Variables 9

C22C - Alloys 7

H01F - MAGNETS; INDUCTANCES; TRANSFORMERS; Selection OF Materials FOR Their Magnetic Properties 7

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 6

H02H - Emergency Protective Circuit Arrangements 5

Y02T - Climate Change Mitigation Technologies Related TO Transportation 5

C01P - Indexing Scheme Relating TO Structural AND Physical Aspects OF Solid Inorganic Compounds 4

H01G - CAPACITORS; Capacitors, Rectifiers, Detectors, Switching Devices, Light-sensitive OR Temperature-sensitive Devices OF THE Electrolytic Type 3

C01G - Compounds Containing Metals NOT Covered BY Subclasses C01d OR C01f 3

Y02B - Climate Change Mitigation Technologies Related TO Buildings, e.g. Housing, House Appliances OR Related End-user Applications 3

Top 15 of 34 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

FDK Corporation's patent record in context - here's where to go next.

FDK Corporation's lead technology class is H01M (Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy), 70.9% of its portfolio - see every assignee active in that class. Explore H01M
Ranked #2,990 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare FDK Corporation against Centre National d'Études Spatiales, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 45.5/100 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.