PlainPatent
USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Woojin Plastic Co., Ltd.

USPTO PatentsView assignee record - 102 granted patents across 11 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: A44B (BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE).

Explore the portfolio See the ranking
102
Total patents granted
11
CPC technology areas
2.1
Avg claims per patent
+62%
5-year filing velocity

The verdict

Woojin holds 102 US patents across 11 technology areas, rank #3,614 of 50,000 tracked assignees.

#3,614
of 50,000 US assignees by volume
Top 49%
by Innovation Score (35.7/100)
2.1
avg claims per patent
+62%
filing velocity, last 5 yrs

Portfolio overview

Woojin Plastic Co., Ltd. has been granted 102 US utility patents between 2015 and 2025, placing Woojin Plastic Co., Ltd. at rank #3,614 across all assignees tracked by PlainPatent. This portfolio spans 11 distinct Cooperative Patent Classification (CPC) subclasses, averaging 2.1 claims per patent with primary concentration in A44B (BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE). As a Foreign Corporation, Woojin Plastic Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, Woojin sits between Tonal Systems, Inc. (102 patents, rank #3,610) and Ceraloc Innovation AB (101 patents, rank #3,618) - the closest US assignees by grant volume. The composite Innovation Score of 35.7/100 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 63 grants, compared with 39 in the 2015–2019 window, a +62% 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. Woojin Plastic Co., Ltd.'s 2.1 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 Woojin Plastic Co., Ltd. against peers pursuing similar technology classes.

Who files at Woojin's volume?

Granted US patents 2015–2025 versus its nearest-ranked assignees by volume, this company marked ◀

patents

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.

Source USPTO PatentsView, granted utility patents As of 2015–2025

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.

Woojin's Innovation Score vs. every tracked assignee

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

36 Top 49% higher than 51% of 50,000 US assignees

0–10: 687 US assignees (1%). Below this entry. 10–20: 2,527 US assignees (5%). Below this entry. 20–30: 13,162 US assignees (26%). Below this entry. 30–40: 15,294 US assignees (31%). This entry sits in this band. 40–50: 11,491 US assignees (23%). Above this entry. 50–60: 5,058 US assignees (10%). Above this entry. 60–70: 1,537 US assignees (3%). Above this entry. 70–80: 234 US assignees (0%). Above this entry. 80–90: 10 US assignees (0%). Above this entry. 90–100: 0 US assignees (0%). Above this entry. This assignee 0 100 every tracked assignee, bucketed by value

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

05101520 20152016201720182019202020212022202320242025 4
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%
2025 4 3.9%

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

Top 11 of 11 technology areas

Patent Moat Analysis

Portfolio Volume Moderate
Tech Breadth Focused
Claim Depth Simple
Velocity Accelerating

Where it ranks

Overall rank by patents

#3,614

Across all tracked assignees

Innovation Score

35.7 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 Woojin Plastic Co., Ltd. hold?
Woojin Plastic Co., Ltd. holds 102 US granted patents filed 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. This composite metric weighs portfolio volume (40%), filing 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. The company has filed patents in 11 CPC subclasses total.
Is Woojin Plastic Co., Ltd.'s patent filing rate increasing or decreasing?
Woojin Plastic Co., Ltd.'s recent filing velocity is +62% compared to the prior five-year period. This indicates accelerating innovation.
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 relatively simple claim structure, typical for focused inventions.
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.

How to use this portfolio

Woojin's 102 grants land it in the top 49% 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 - Woojin ranks #3,614 of 50,000. Top 50 holders
  • Most of this portfolio concentrates in A44B - see who else leads that technology area. A44B 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

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.