EDLC Quality Control Patent Snapshot 2026
The EDLC quality control patent space is highly concentrated, with the top five filers accounting for all activity among the hundred largest filers and Korea Kumho Petrochemical leading on patent records. Filing activity peaked around 2019–2020 and has since declined, signaling a mature, slow-moving field with limited new entrants.
Korea Kumho Petrochemical leads a tightly held, small-corpus field
Korea Kumho Petrochemical holds the top position in the ranking with 7 patent records, followed by New York University with 6 patent records. The remaining ranked applicants — Marcon Electron, Telcordia Technologies, and Isuzu Motors — each hold a single patent record.
The top five filers account for 100% of the combined total among the ranked applicants visible in this query, indicating extreme concentration with no meaningful second or third tier. The gap between the leader and the rest of the field is proportionally large for such a small corpus.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Korea Kumho Petrochemical Co., Ltd. | 7 | |
| 2 | New York University | 6 | |
| 3 | MARCON ELECTRON CO LTD | 1 | |
| 4 | Telcordia Technologies Inc. | 1 | |
| 5 | Isuzu Motors Ltd. | 1 |
Korea Kumho Petrochemical’s leadership reflects a deliberate focus on measurement and characterization methods (G01R and G06F), while New York University’s near-equal presence suggests academic research has played an unusually prominent role in shaping this niche. This dual corporate–academic structure is atypical and may indicate the field has not yet attracted broad industrial adoption.
The most recent filing periods should be treated as provisional given standard patent publication lag; the apparent absence of activity in 2025–2026 does not yet represent confirmed inactivity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Intermittent filing with measurement-focused technology composition
The annual filing trend reveals a sparse, episodic pattern rather than sustained growth, while the technology composition chart shows electric and magnetic measurement methods showing visible activity in the field.
Annual filing trend
Filings first appeared in 2019 and 2020, dropped to zero through 2022–2023, and showed a brief return in 2024. The overall recent-window growth is negative at -50%, consistent with the lifecycle stage. The 2024 uptick and the 2025–2026 zeros should be read cautiously given publication lag.
↗ Hover for values · click a bar to ask EurekaTechnology composition
G01R (Electric and magnetic measurement) is the visible branch, reflecting a field centered on characterization and diagnostic methods. G06F (digital data processing) and H01M (batteries, cells and fuel cells) appear at equal secondary weight, while H01G (Capacitors) — the most directly EDLC-specific class — is the least represented, with only 2 records.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
System and method for magnetic resonance mapping o…
A method of diagnosing a conducting structure includes providing the conducting structure in a magnetic field, immersing the conducting structure in a detection medium, or placing a detection medium in the vicinity of the conducting structure, exciting nuclear or electronic spins within the detection medium using a broad-band excitation pulse, receiving an… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Method and apparatus for determining Characteristi… | 213 |
| 2 | Method and apparatus for determining characteristi… | 36 |
| 3 | Infrared thermographic method for process monitori… | 29 |
| 4 | Systems and methods for magnetic susceptometry of … | 10 |
| 5 | Method and apparatus for determining characteristi… | 7 |
| 6 | System and method for magnetic resonance mapping o… | 6 |
| 7 | System and method for magnetic resonance mapping o… | 4 |
| 8 | Electric double-layer capacitor | 2 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
Korea Kumho Petrochemical
Korea Kumho Petrochemical holds 7 patent records and concentrates on G01R 31 (electric and magnetic measurement), G06F 17 (digital data processing), and H01M 10 (batteries and fuel cells). This broad IPC footprint suggests the company is protecting a system-level quality-control approach rather than a single measurement technique. No momentum data is available for this applicant in the recent period.
patent records: 7New York University
New York University holds 6 patent records and focuses on G01R 31 and G01R 33 (electric and magnetic measurement) alongside G01N 24 (material analysis and testing). Its trajectory is marked as a new entrant in the recent filing period, suggesting recent academic research activity is now reaching publication. The overlap with Korea Kumho Petrochemical in G01R 31 makes freedom-to-operate analysis essential for any commercial licensee.
patent records: 6Frequently asked questions
The corpus covers 6 patent families in scope. It is a small, specialized field and should be interpreted accordingly when assessing competitive density.
Korea Kumho Petrochemical is the top-ranked applicant with 7 patent records, followed closely by New York University with 6 patent records.
No. The lifecycle stage is classified as Decline, with annual filings easing from a 2019 peak and recent-window growth at -50%. The most recent filing periods carry publication lag and should be treated as provisional.
G01R (Electric and magnetic measurement) is the visible branch, indicating that characterization and diagnostic measurement methods form the core of EDLC quality-control IP. H01G (Capacitors), despite being the most device-relevant class, has the fewest records.
The United States is the lead jurisdiction. Europe (EPO), Japan, WIPO (PCT), and Australia each have limited coverage, meaning international protection outside the US is sparse.
No co-applicant filings are recorded in the corpus. Korea Kumho Petrochemical and New York University have filed independently, and no cross-sector partnerships are evidenced in the data.
Built on Patsnap Open Platform
This report’s underlying patent dataset — filings, assignees, technology clusters — is open for developers via MCP and REST API. Free to start, 10,000 credits, no credit card required.
Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.