Where does Sejong IND. Co., Ltd rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Sejong IND. Co., Ltd ranks #42,874 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 Sejong IND. Co., Ltd hold?

Sejong IND. Co., Ltd holds 6 US utility patents granted between 2015 and 2021, spanning 15 technology areas.

What is Sejong IND. Co., Ltd's Innovation Score?

Sejong IND. Co., Ltd has an Innovation Score of 25.0 out of 100 (16th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Sejong IND. Co., Ltd's patent grant rate increasing or decreasing?

Sejong IND. Co., Ltd's recent grant velocity is -50% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

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

Sejong IND. Co., Ltd's patents average 7.7 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 Sejong IND. 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

Sejong IND. Co., Ltd

Q: What technology areas does Sejong IND. Co., Ltd focus on?

Sejong IND. Co., Ltd's top technology area is F01N (Gas-flow Silencers OR Exhaust Apparatus FOR Machines OR Engines IN GENERAL; Gas-flow Silencers OR Exhaust Apparatus FOR Internal-combustion Engines) with 4 patents, ranking #185 of 487 assignees active in that subclass. Grants appear in 15 CPC subclasses total.

USPTO PatentsView assignee record - 6 granted patents across 15 technology areas, recorded in grant years 2015–2021. 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: F01N (Gas-flow Silencers OR Exhaust Apparatus FOR Machines OR Engines IN GENERAL; Gas-flow Silencers OR Exhaust Apparatus FOR Internal-combustion Engines).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Sejong ranks #42,874 of 49,997 tracked US assignees by granted-patent volume, with 6 patents across 15 technology areas.

#42,874
of 49,997 US assignees by volume: 16th percentile
by Innovation Score (25.0/100): 7.7
avg claims per patent: -50%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R42874 · Foreign Corporation #42,874 · 6 grants

GRANTS-MICRO · LOWER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 6 grants
LOWER-Q #42,874/49,997
PHOTO-FINISH Seasucker
CPC-FOCUS F01N · 15 areas
INNOV-THIN 25.0/100
CLAIMS-SPARSE 7.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -50% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Seasucker, LLC (±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 Sejong’s 25.0 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 6.7 pts (27%) Velocity 0.0 pts (0%) Breadth 13.7 pts (55%) Claim depth 4.6 pts (18%)

Qualcomm Incorporated · highest

85
Sejong IND · this assignee

25
3D Lighting… · lowest

7

What this shows Sejong's Innovation Score is 25.0/100 (16th percentile 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 Sejong?

Each dot is one of Sejong’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). Sejong’s own 7.7 claims/patent is at or below the 12.8 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Sejong's grants concentrate

Sejong IND. Co., Ltd is a focused PatentsView assignee: 15 CPC subclasses with 66.7% of grants classified under F01N (Gas-flow Silencers OR Exhaust Apparatus FOR Machines OR Engines IN GENERAL; Gas-flow Silencers OR Exhaust Apparatus FOR Internal-combustion Engines). By volume, Sejong sits between Seasucker, LLC and Semmelweis Egyetem.

Seasucker

6
Sebright Products

6
Secureall

6
Seedx

6
Sekura Global IP…

6
Selcia

6
Self USA

6
Semmelweis Egyetem

6
Sejong IND ◀

6

What this shows Sejong holds 6 patents at rank #43,128, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Sejong

By rank, the assignees closest to #43,128 in granted patent volume.

Leaders in F01N (Gas-flow Silencers OR Exhaust Apparatus FOR Machines OR E…)

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

Sejong's Innovation Score vs. every tracked assignee

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

25 16th percentile higher than 16% 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 · 2015–2021

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Sejong IND. Co., Ltd patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	16.7%
2017	1	16.7%
2018	1	16.7%
2019	1	16.7%
2020	1	16.7%
2021	1	16.7%

Which technologies does Sejong IND. Co., Ltd patent most?

F01N - Gas-flow Silencers OR Exhaust Apparatus FOR Machines OR Engines IN GENERAL; Gas-flow Silencers OR Exhaust Apparatus FOR Internal-combustion Engines 4

Y02T - Climate Change Mitigation Technologies Related TO Transportation 3

H10N - Electric Solid-state Devices NOT Otherwise Provided FOR 1

F02M - Supplying Combustion Engines IN General With Combustible Mixtures OR Constituents Thereof 1

F02D - Controlling Combustion Engines 1

F16K - VALVES; TAPS; COCKS; ACTUATING-FLOATS; Devices FOR Venting OR Aerating 1

F28D - Heat-exchange Apparatus, NOT Provided FOR IN Another Subclass, IN Which THE Heat-exchange Media DO NOT Come Into Direct Contact 1

F28F - Details OF Heat-exchange AND Heat-transfer Apparatus, OF General Application 1

F01P - Cooling OF Machines OR Engines IN GENERAL; Cooling OF Internal-combustion Engines 1

F02G - HOT GAS OR Combustion-product Positive-displacement Engine Plants ; USE OF Waste Heat OF Combustion ENGINES; NOT Otherwise Provided FOR 1

H01R - Electrically-conductive CONNECTIONS; Structural Associations OF A Plurality OF Mutually-insulated Electrical Connecting ELEMENTS; Coupling DEVICES; Current Collectors 1

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 1

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 1

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 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 15 of 15 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

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

Sejong IND. Co., Ltd's lead technology class is F01N (Gas-flow Silencers OR Exhaust Apparatus FOR Machines OR Engines IN GENERAL; Gas-flow Silencers OR Exhaust Apparatus FOR Internal-combustion Engines), 66.7% of its portfolio - see every assignee active in that class. Explore F01N
Ranked #42,874 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Sejong IND. Co., Ltd against Seasucker, LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 25.0/100 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.