USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Tokuden Co., Ltd.

USPTO PatentsView assignee record - 26 granted patents across 21 technology areas, active 2016–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H05B (ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL).

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

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

7.0

Avg claims per patent

-47%

5-year filing velocity

The verdict

Tokuden holds 26 US patents across 21 technology areas, rank #11,834 of 50,000 tracked assignees.

#11,834
of 50,000 US assignees by volume: Top 56%
by Innovation Score (33.4/100): 7.0
avg claims per patent: -47%
filing velocity, last 5 yrs

Portfolio overview

Tokuden Co., Ltd. has been granted 26 US utility patents between 2016 and 2025, placing Tokuden Co., Ltd. at rank #11,834 across all assignees tracked by PlainPatent. This portfolio spans 21 distinct Cooperative Patent Classification (CPC) subclasses, averaging 7.0 claims per patent with primary concentration in H05B (ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL). As a Foreign Corporation, Tokuden Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, Tokuden sits between Thermotek, Inc. (26 patents, rank #11,830) and Tubitak (26 patents, rank #11,838) - the closest US assignees by grant volume. The composite Innovation Score of 33.4/100 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 9 grants, compared with 17 in the 2015–2019 window, a -47% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. 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. Tokuden Co., Ltd.'s 7.0 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 21 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Tokuden Co., Ltd. against peers pursuing similar technology classes.

Thermotek

26
TI Automotive (Fu…

26
Tietex Internatio…

26
Tod's S P A

26
Topivert Pharma

26
Toptica Photonics

26
Trinity North Ame…

26
Tubitak

26
Tokuden ◀

26

What this shows Tokuden holds 26 patents at rank #11,834, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Tokuden

By rank, the assignees closest to #11,834 in granted patent volume.

Leaders in H05B (Electric Heating)

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

Tokuden's Innovation Score vs. every tracked assignee

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

33 Top 56% higher than 44% 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 · 2016–2025

Grants by year

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

View data table

Tokuden Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	3	11.5%
2017	5	19.2%
2018	2	7.7%
2019	7	26.9%
2020	3	11.5%
2021	2	7.7%
2022	1	3.8%
2023	2	7.7%
2025	1	3.8%

Which technologies does Tokuden Co., Ltd. patent most?

H05B - ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL 17

F22G - SUPERHEATING OF STEAM 8

F22B - METHODS OF STEAM GENERATION; STEAM BOILERS 8

H01F - MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES 4

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 4

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 3

B29C - SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 2

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 1

C10G - CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION ; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES 1

F16L - PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL 1

F24H - FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL 1

D21G - CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES 1

B21B - ROLLING OF METAL 1

F16C - SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS 1

F27D - DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE 1

Top 15 of 21 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Multi-domain

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#11,834

Across all tracked assignees

Innovation Score

33.4 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 Tokuden Co., Ltd. hold?

Tokuden Co., Ltd. holds 26 US granted patents filed between 2016 and 2025, spanning 21 technology areas.

What is Tokuden Co., Ltd.'s Innovation Score?

Tokuden Co., Ltd. has an Innovation Score of 33.4 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Tokuden Co., Ltd. focus on?

Tokuden Co., Ltd.'s top technology area is H05B (ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL) with 17 patents. The company has filed patents in 21 CPC subclasses total.

Is Tokuden Co., Ltd.'s patent filing rate increasing or decreasing?

Tokuden Co., Ltd.'s recent filing velocity is -47% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

What does claim depth mean for Tokuden Co., Ltd.'s patents?

Tokuden Co., Ltd.'s patents average 7.0 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the Tokuden 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.

How to use this portfolio

Tokuden's 26 grants land it in the top 56% 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 - Tokuden ranks #11,834 of 50,000. Top 50 holders
Most of this portfolio concentrates in H05B - see who else leads that technology area. H05B 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.