USPTO 2015–2025 USPTO PatentsView Foreign Corporation

TDK Corporation

USPTO PatentsView assignee record - 2,914 granted patents across 171 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H01F (MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

2,914

Total patents granted

171

CPC technology areas

11.4

Avg claims per patent

+91%

5-year filing velocity

The verdict

TDK holds 2,914 US patents across 171 technology areas, rank #129 of 50,000 tracked assignees.

#129
of 50,000 US assignees by volume: Top 1%
by Innovation Score (66.6/100): 11.4
avg claims per patent: +91%
filing velocity, last 5 yrs

Portfolio overview

TDK Corporation has been granted 2,914 US utility patents between 2015 and 2025, placing TDK Corporation at rank #129 across all assignees tracked by PlainPatent. This portfolio spans 171 distinct Cooperative Patent Classification (CPC) subclasses, averaging 11.4 claims per patent with primary concentration in H01F (MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES). As a Foreign Corporation, TDK Corporation is one of the broader-portfolio assignees in the PatentsView dataset. By volume, TDK sits between Industrial Technology Research Institute (3,023 patents, rank #125) and SONY Semiconductor Solutions Corporation (2,791 patents, rank #133) - the closest US assignees by grant volume. The composite Innovation Score of 66.6/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 1,913 grants, compared with 1,001 in the 2015–2019 window, a +91% shift in five-year velocity. An acceleration of this magnitude signals aggressive R&D investment and expanding technical ambition. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. TDK Corporation's 11.4 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a diversified footprint across 100+ CPC subclasses spreads risk across many technology fronts. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark TDK Corporation against peers pursuing similar technology classes.

Industrial Techno…

3,023
Adobe

3,022
DOW Global

3,004
Toshiba Memory

2,972
TDK ◀

2,914
Juniper Networks

2,902
Beijing Xiaomi Mo…

2,840
Comcast Cable Com…

2,828
SONY Semiconducto…

2,791

What this shows TDK holds 2,914 patents at rank #129, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near TDK

By rank, the assignees closest to #129 in granted patent volume.

Leaders in H01F (Magnets)

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

TDK's Innovation Score vs. every tracked assignee

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

67 Top 1% higher than 99% 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

TDK Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	160	5.5%
2016	158	5.4%
2017	202	6.9%
2018	190	6.5%
2019	291	10.0%
2020	329	11.3%
2021	312	10.7%
2022	362	12.4%
2023	351	12.0%
2024	294	10.1%
2025	265	9.1%

Which technologies does TDK Corporation patent most?

H01F - MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES 904

H10N - ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR 453

G01R - MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 405

H01G - CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE 389

H10B - ELECTRONIC MEMORY DEVICES 205

G11C - STATIC STORES 194

H01L - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10 186

H05K - PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS 180

G11B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER 174

C22C - ALLOYS 170

C04B - LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE ; CERAMICS ; REFRACTORIES; TREATMENT OF NATURAL STONE 164

H10D - INORGANIC ELECTRIC SEMICONDUCTOR DEVICES 155

H03H - IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS 149

G01D - MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR 131

H02J - CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY 122

Top 15 of 171 technology areas

Patent Moat Analysis

Portfolio Volume Strong

Tech Breadth Diversified

Claim Depth Simple

Velocity Accelerating

Where it ranks

Overall rank by patents

#129

Across all tracked assignees

Innovation Score

66.6 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does TDK Corporation hold?

TDK Corporation holds 2,914 US granted patents filed between 2015 and 2025, spanning 171 technology areas.

What is TDK Corporation's Innovation Score?

TDK Corporation has an Innovation Score of 66.6 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does TDK Corporation focus on?

TDK Corporation's top technology area is H01F (MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES) with 904 patents. The company has filed patents in 171 CPC subclasses total.

Is TDK Corporation's patent filing rate increasing or decreasing?

TDK Corporation's recent filing velocity is +91% compared to the prior five-year period. This indicates accelerating innovation.

What does claim depth mean for TDK Corporation's patents?

TDK Corporation's patents average 11.4 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the TDK 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.

How to use this portfolio

TDK's 2,914 grants land it in the top 1% by Innovation Score, but volume alone doesn't tell you where the strength sits.

Read that count against the largest US assignees before treating it as dominance - TDK ranks #129 of 50,000. Top 50 holders
Most of this portfolio concentrates in H01F - see who else leads that technology area. H01F leaders
Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

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 byPlainPatent Editorial, US Patent Intelligence Editorial Team · 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.