USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Tamagawa Seiki Co., Ltd.

USPTO PatentsView assignee record - 8 granted patents across 11 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: 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 OT).

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

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

9.1

Avg claims per patent

+0%

5-year filing velocity

The verdict

Tamagawa holds 8 US patents across 11 technology areas, rank #33,507 of 50,000 tracked assignees.

#33,507
of 50,000 US assignees by volume: Top 25%
by Innovation Score (44.8/100): 9.1
avg claims per patent: +0%
filing velocity, last 5 yrs

Portfolio overview

Tamagawa Seiki Co., Ltd. has been granted 8 US utility patents between 2015 and 2025, placing Tamagawa Seiki Co., Ltd. at rank #33,507 across all assignees tracked by PlainPatent. This portfolio spans 11 distinct Cooperative Patent Classification (CPC) subclasses, averaging 9.1 claims per patent with primary concentration in 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 OT). As a Foreign Corporation, Tamagawa Seiki Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, Tamagawa sits between Taidoc Technology Corporation (8 patents, rank #33,503) and Target Systemelektronik Gmbh &CO. KG (8 patents, rank #33,511) - the closest US assignees by grant volume. The composite Innovation Score of 44.8/100 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 4 grants, compared with 4 in the 2015–2019 window, a +0% shift in five-year velocity. Steady filing volume suggests sustained innovation without dramatic pivots. 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. Tamagawa Seiki Co., Ltd.'s 9.1 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while concentration in 11 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Tamagawa Seiki Co., Ltd. against peers pursuing similar technology classes.

Taidoc Technology

8
Taiflex Scientific

8
Taiwan Chelic

8
Taiwan SHAN YIN I…

8
Tanazawa Hakkosha

8
TANG CHOU Industr…

8
Tapematic S P A

8
Target Systemelek…

8
Tamagawa Seiki ◀

8

What this shows Tamagawa holds 8 patents at rank #33,507, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Tamagawa

By rank, the assignees closest to #33,507 in granted patent volume.

Leaders in G01D (Measuring NOT Specially Adapted FOR A Specific Variable)

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

Tamagawa's Innovation Score vs. every tracked assignee

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

45 Top 25% higher than 75% 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

Tamagawa Seiki Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	12.5%
2016	1	12.5%
2017	1	12.5%
2018	1	12.5%
2022	2	25.0%
2024	1	12.5%
2025	1	12.5%

Which technologies does Tamagawa Seiki Co., Ltd. patent most?

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 3

H01R - ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS 2

H02K - DYNAMO-ELECTRIC MACHINES 2

G06F - ELECTRIC DIGITAL DATA PROCESSING 2

H03M - CODING; DECODING; CODE CONVERSION IN GENERAL 2

H02P - CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS 2

G01R - MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1

G01P - MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT 1

B23K - SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM 1

G01B - MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS 1

H02J - CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY 1

Top 11 of 11 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Focused

Claim Depth Simple

Velocity Growing

Where it ranks

Overall rank by patents

#33,507

Across all tracked assignees

Innovation Score

44.8 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 Tamagawa Seiki Co., Ltd. hold?

Tamagawa Seiki Co., Ltd. holds 8 US granted patents filed between 2015 and 2025, spanning 11 technology areas.

What is Tamagawa Seiki Co., Ltd.'s Innovation Score?

Tamagawa Seiki Co., Ltd. has an Innovation Score of 44.8 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Tamagawa Seiki Co., Ltd. focus on?

Tamagawa Seiki Co., Ltd.'s top technology area is 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) with 3 patents. The company has filed patents in 11 CPC subclasses total.

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

Tamagawa Seiki Co., Ltd.'s recent filing velocity is +0% compared to the prior five-year period. The company is maintaining or growing its patent output.

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

Tamagawa Seiki Co., Ltd.'s patents average 9.1 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the Tamagawa Seiki 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

Tamagawa's 8 grants land it in the top 25% 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 - Tamagawa ranks #33,507 of 50,000. Top 50 holders
Most of this portfolio concentrates in G01D - see who else leads that technology area. G01D 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.