USPTO 2015–2025 USPTO PatentsView Foreign Corporation

STEK Co., Ltd.

USPTO PatentsView assignee record - 7 granted patents across 12 technology areas, active 2019–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: C09J (ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES).

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

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

7.6

Avg claims per patent

+150%

5-year filing velocity

The verdict

STEK holds 7 US patents across 12 technology areas, rank #37,487 of 50,000 tracked assignees.

#37,487
of 50,000 US assignees by volume: Top 65%
by Innovation Score (30.6/100): 7.6
avg claims per patent: +150%
filing velocity, last 5 yrs

Portfolio overview

STEK Co., Ltd. has been granted 7 US utility patents between 2019 and 2025, placing STEK Co., Ltd. at rank #37,487 across all assignees tracked by PlainPatent. This portfolio spans 12 distinct Cooperative Patent Classification (CPC) subclasses, averaging 7.6 claims per patent with primary concentration in C09J (ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES). As a Foreign Corporation, STEK Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, STEK sits between Starjet Technologies Co., Ltd (7 patents, rank #37,483) and Still Gmbh (7 patents, rank #37,491) - the closest US assignees by grant volume. The composite Innovation Score of 30.6/100 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 5 grants, compared with 2 in the 2015–2019 window, a +150% 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. STEK Co., Ltd.'s 7.6 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while concentration in 12 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark STEK Co., Ltd. against peers pursuing similar technology classes.

Starjet

7
State GRID Zhejia…

7
Staubli Bayreuth

7
Stefano Ricci S P…

7
Stella Mccartney

7
Steyr Mannlicher

7
Stichting Maastri…

7
Still

7
STEK ◀

7

What this shows STEK holds 7 patents at rank #37,487, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near STEK

By rank, the assignees closest to #37,487 in granted patent volume.

Leaders in C09J (Adhesives)

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

STEK's Innovation Score vs. every tracked assignee

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

31 Top 65% higher than 35% 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 · 2019–2025

Grants by year

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

View data table

STEK Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2019	2	28.6%
2021	1	14.3%
2022	1	14.3%
2023	1	14.3%
2024	1	14.3%
2025	1	14.3%

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

C09J - ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES 4

B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM 4

G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 2

B60J - WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES 2

C09D - COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR 2

C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients 2

C08F - MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS 1

C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS 1

B08B - CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL 1

F26B - DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM 1

G06T - IMAGE DATA PROCESSING OR GENERATION, IN GENERAL 1

C08L - COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 1

Top 12 of 12 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Focused

Claim Depth Simple

Velocity Accelerating

Where it ranks

Overall rank by patents

#37,487

Across all tracked assignees

Innovation Score

30.6 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 STEK Co., Ltd. hold?

STEK Co., Ltd. holds 7 US granted patents filed between 2019 and 2025, spanning 12 technology areas.

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

STEK Co., Ltd. has an Innovation Score of 30.6 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

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

STEK Co., Ltd.'s top technology area is C09J (ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES) with 4 patents. The company has filed patents in 12 CPC subclasses total.

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

STEK Co., Ltd.'s recent filing velocity is +150% compared to the prior five-year period. This indicates accelerating innovation.

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

STEK Co., Ltd.'s patents average 7.6 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the STEK 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

STEK's 7 grants land it in the top 65% 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 - STEK ranks #37,487 of 50,000. Top 50 holders
Most of this portfolio concentrates in C09J - see who else leads that technology area. C09J 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.