Where does Poongsan Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Poongsan Corporation ranks #20,255 of 50,000 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Poongsan Corporation hold?

Poongsan Corporation holds 14 US utility patents granted between 2015 and 2023, spanning 19 technology areas.

What is Poongsan Corporation's Innovation Score?

Poongsan Corporation has an Innovation Score of 37.7 out of 100 (top 43% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Poongsan Corporation's patent grant rate increasing or decreasing?

Poongsan Corporation's recent grant velocity is +33% compared to the prior five-year period (grant years, not application filing dates). The company is maintaining or growing its granted-patent output.

What does claim depth mean for Poongsan Corporation's patents?

Poongsan Corporation's patents average 7.6 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 Poongsan Corporation 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

Poongsan Corporation

Q: What technology areas does Poongsan Corporation focus on?

Poongsan Corporation's top technology area is C22F (CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS) with 8 patents. Grants appear in 19 CPC subclasses total.

USPTO PatentsView assignee record - 14 granted patents across 19 technology areas, recorded in grant years 2015–2023. 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: C22F (CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS).

Compiled by PlainPatent · May 15, 2026

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Poongsan ranks #20,255 of 50,000 tracked US assignees by granted-patent volume, with 14 patents across 19 technology areas.

#20,255
of 50,000 US assignees by volume: Top 43%
by Innovation Score (37.7/100): 7.6
avg claims per patent: +33%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R20255 · Foreign Corporation #20,255 · 14 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-UP · BOOK-FULL

GRANTS-MICRO 14 grants
MID-PACK #20,255/50,000
PHOTO-FINISH Plow & Hearth
CPC-FOCUS C22F · 19 areas
INNOV-THIN 37.7/100
CLAIMS-SPARSE 7.6 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-UP +33% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Plow & Hearth, 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.

Qualcomm Incorporated · highest

85
Poongsan · this assignee

38
3D Lighting Innovati… · lowest

7

What this shows Poongsan Corporation stamps GRANTS-MICRO, MID-PACK, PHOTO-FINISH, CPC-FOCUS, INNOV-THIN, CLAIMS-SPARSE, TYPE-FRNCORP, VEL-UP, BOOK-FULL. Volume places it #20,255 of 50,000; Innovation Score 37.7/100 sits in the top 43% of the PatentsView-derived corpus. Closest grant-volume peer on this plate is Plow & Hearth, Llc (±0 grants).

Portfolio overview

Poongsan Corporation has been granted 14 US utility patents between 2015 and 2023, placing Poongsan Corporation at #20,255 of 50,000 across all assignees tracked by PlainPatent. This portfolio spans 19 distinct Cooperative Patent Classification (CPC) subclasses, averaging 7.6 claims per patent with primary concentration in C22F (CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS). As a Foreign Corporation, Poongsan Corporation is one of the more focused assignees in the PatentsView dataset. By volume, Poongsan sits between Plow & Hearth, Llc (14 patents, rank #20,259) and Powin Energy Corporation (14 patents, rank #20,267) - the closest US assignees by grant volume. The composite Innovation Score of 37.7/100 blends portfolio volume, grant velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Grant cadence records the difference between two grant-year windows. Between 2020 and 2024 the company received 8 grants, compared with 6 in the 2015–2019 window, a +33% shift in five-year grant velocity. Both windows cover five complete grant years; the latest PatentsView year is a partial release and is excluded from this comparison, though it still appears in the yearly table and chart below. Grant timing can lag the related application by years, so this comparison does not establish current R&D spending, strategic intent, or a company’s application activity. The Foreign Corporation classification provides context for the assignee record, not a conclusion about its business strategy.

Claim depth and technology breadth describe this aggregate record. Poongsan Corporation's 7.6 average claims per patent is an average count, not a measure of claim scope, legal strength, enforceability, or design-around risk. The record spans 19 CPC subclasses. Combined with portfolio volume, these figures let readers compare the documented grant records of assignees in similar technology classes.

Plow & Hearth

14
Pogotec

14
Polycorp

14
Polytechnic Insti…

14
Portero Holdings

14
Potrero Medical

14
Power Systems

14
Powin Energy

14
Poongsan ◀

14

What this shows Poongsan holds 14 patents at rank #20,263, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Poongsan

By rank, the assignees closest to #20,263 in granted patent volume.

Leaders in C22F (Changing THE Physical Structure OF Non-ferrous Metals AND…)

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

Poongsan's Innovation Score vs. every tracked assignee

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

38 Top 43% higher than 57% 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 · 2015–2023

Grants by year

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

View data table

Poongsan Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	7.1%
2016	1	7.1%
2017	3	21.4%
2019	1	7.1%
2021	3	21.4%
2022	1	7.1%
2023	4	28.6%

Which technologies does Poongsan Corporation patent most?

C22F - CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS 8

C22C - ALLOYS 8

B21B - ROLLING OF METAL 5

C23C - COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL 3

C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING 3

F42B - EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION 2

B22F - WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER ; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER 1

H04N - PICTORIAL COMMUNICATION, e.g. TELEVISION 1

C25D - PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR 1

C25F - PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR 1

H05B - ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL 1

H01L - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10 1

Y02C - CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG] 1

C01B - NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C 1

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 1

Top 15 of 19 technology areas

Where it ranks

Overall rank by patents

#20,255

of 50,000 tracked assignees

Innovation Score

37.7 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

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.