Where does Woojin Plastic Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Woojin Plastic Co., Ltd. ranks #3,615 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 Woojin Plastic Co., Ltd. hold?

Woojin Plastic Co., Ltd. holds 102 US utility patents granted between 2015 and 2025, spanning 11 technology areas.

What is Woojin Plastic Co., Ltd.'s Innovation Score?

Woojin Plastic Co., Ltd. has an Innovation Score of 35.7 out of 100 (top 49% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Woojin Plastic Co., Ltd. focus on?

Woojin Plastic Co., Ltd.'s top technology area is A44B (Buttons, Pins, Buckles, Slide Fasteners, OR THE Like) with 10 patents, ranking #18 of 276 assignees active in that subclass. Grants appear in 11 CPC subclasses total.

Is Woojin Plastic Co., Ltd.'s patent grant rate increasing or decreasing?

Woojin Plastic Co., Ltd.'s recent grant velocity is +51% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

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

Woojin Plastic Co., Ltd.'s patents average 2.1 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 Woojin Plastic 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.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Woojin Plastic Co., Ltd.

USPTO PatentsView assignee record - 102 granted patents across 11 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: A44B (Buttons, Pins, Buckles, Slide Fasteners, OR THE Like).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Woojin ranks #3,615 of 49,997 tracked US assignees by granted-patent volume, with 102 patents across 11 technology areas.

#3,615
of 49,997 US assignees by volume: Top 49%
by Innovation Score (35.7/100): 2.1
avg claims per patent: +51%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R3615 · Foreign Corporation #3,615 · 102 grants

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

GRANTS-MID 102 grants
TOP-DECILE #3,615/49,997
PHOTO-FINISH Technische Universit…
CPC-FOCUS A44B · 11 areas
INNOV-THIN 35.7/100
CLAIMS-SPARSE 2.1 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +51% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Technische Universität Wien (±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 Woojin’s 35.7 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 16.0 pts (45%) Velocity 6.7 pts (19%) Breadth 11.7 pts (33%) Claim depth 1.3 pts (4%)

Qualcomm Incorporated · highest

85
Biomet C V · near

36
Cardinal Health… · near

36
Cmech (GUANGZHOU) · near

36
Isowa · near

36
Woojin Plastic · this assignee

36
3D Lighting… · lowest

7

What this shows Woojin's Innovation Score is 35.7/100 (top 49% 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 Woojin?

Each dot is one of Woojin’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). Woojin’s own 2.1 claims/patent is at or below the 16.6 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Woojin's grants concentrate

Woojin Plastic Co., Ltd. is a focused PatentsView assignee: 11 CPC subclasses with 9.8% of grants classified under A44B (Buttons, Pins, Buckles, Slide Fasteners, OR THE Like). Peak complete grant year is 2023 (15 grants) versus a trough of 4 in 2018. By volume, Woojin sits between Tonal Systems, Inc. and Ceraloc Innovation AB.

Woojin's three-year grant acceleration

From 2019–2021 to 2022–2024, Woojin Plastic Co., Ltd. moved from 34 to 34 grants (1.00x 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 #1,181. See the growth leaderboard.

Tonal Systems

102
Technische Univer…

102
VMI Holland B V

102
Veolia Water Solu…

102
Wabash National

102
Woojin Plastic ◀

102
Amsted Rail

101
Bentley Motors

101
Ceraloc Innovatio…

101

What this shows Woojin holds 102 patents at rank #3,614, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Woojin

By rank, the assignees closest to #3,614 in granted patent volume.

Leaders in A44B (Buttons)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Woojin, neither rank-band nor same-CPC leaders (those blocks stay above). In A44B (Buttons), Woojin ranks #18 of 276 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (36 here).

Biomet C.V. 36 Cardinal Health Switzerland 515 GMBH 36 Kabushiki Kaisha Isowa 36 Cmech (GUANGZHOU) Ltd. 36

Similar claim depth

Nearest assignees by average claims per patent (2.1 here).

Saucony, Inc. 2.1 avg Babyliss Faco SRL 2.1 avg Converse Inc. 2.1 avg Shenzhen Eigate Technology Co., Ltd. 2.1 avg

Woojin's Innovation Score vs. every tracked assignee

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

36 Top 49% higher than 51% 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

Woojin Plastic Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	6	5.9%
2016	10	9.8%
2017	10	9.8%
2018	4	3.9%
2019	9	8.8%
2020	13	12.7%
2021	12	11.8%
2022	7	6.9%
2023	15	14.7%
2024	12	11.8%
2025partial year	4	3.9%

Which technologies does Woojin Plastic Co., Ltd. patent most?

A44B - Buttons, Pins, Buckles, Slide Fasteners, OR THE Like 10

A45F - Travelling OR Camp EQUIPMENT: Sacks OR Packs Carried ON THE Body 6

A45C - PURSES; LUGGAGE; Hand Carried Bags 5

A44D - Indexing Scheme Relating TO Buttons, Pins, Buckles OR Slide Fasteners, AND TO Jewellery, Bracelets OR Other Personal Adornments 5

Y10T - Technical Subjects Covered BY Former US Classification 2

A44C - Personal Adornments, e.g. JEWELLERY; Coins 2

A41F - Garment FASTENINGS; Suspenders 2

A42B - HATS; Head Coverings 1

F16G - Belts, Cables, OR Ropes, Predominantly Used FOR Driving PURPOSES; CHAINS; Fittings Predominantly Used Therefor 1

E04H - Buildings OR Like Structures FOR Particular PURPOSES; Swimming OR Splash Baths OR POOLS; MASTS; FENCING; Tents OR Canopies, IN General 1

G10K - Sound-producing DEVICES; Methods OR Devices FOR Protecting Against, OR FOR Damping, Noise OR Other Acoustic Waves IN GENERAL; Acoustics NOT Otherwise Provided FOR 1

Top 11 of 11 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

Woojin Plastic Co., Ltd.'s patent record in context - here's where to go next.

Woojin Plastic Co., Ltd.'s lead technology class is A44B (Buttons, Pins, Buckles, Slide Fasteners, OR THE Like), 9.8% of its portfolio - see every assignee active in that class. Explore A44B
Ranked #3,615 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Woojin Plastic Co., Ltd. against Tonal Systems, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 35.7/100 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.