PEMFC Diagnostics & Testing Patent Snapshot 2026
This is a highly concentrated, early-stage niche: just two applicants account for all indexed families, with Greenlight Innovation Corp holding a commanding lead. Activity peaked sharply in 2021 and has since receded, signalling that the current patent corpus is thin and largely shaped by one specialist player.
Two filers dominate a very small corpus
The indexed corpus covers 6 patent families, with Greenlight Innovation Corp ranked first at 5 patent families and Intelligent Energy Ltd ranked second at 1 patent family — together they account for the entire visible evidence snapshot.
The top five filers hold 100% of the combined total among the ranked applicants visible in this query, indicating an extreme concentration with no meaningful second tier. The gap between the leader and the sole challenger is substantial.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Greenlight Innovation Corp | 5 | |
| 2 | Intelligent Energy Ltd | 1 |
Greenlight Innovation Corp’s visible position suggests it has established a proprietary platform for PEM fuel cell test-station technology; any new entrant would need to design around this body of work or find adjacent angles not yet claimed.
The most recent filing years carry publication lag and may under-represent very recent activity; the corpus should be treated as a working snapshot rather than a definitive final count. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A single activity spike in 2021 and a multi-class technology mix
Filing activity was essentially absent before 2021, surged to 5 families in that year, and has produced no indexed families since. The technology class distribution spans electrochemical, measurement, and structural testing branches.
Annual filing trend
All observable activity is concentrated in 2021; years before and after show zero indexed families. Because publication lag typically affects the most recent 18–24 months, the post-2021 absence may partly reflect lag, but the overall pattern is consistent with a brief, focused filing campaign rather than sustained growth.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (batteries, cells and fuel cells) and G01R (electric and magnetic measurement) each cover the majority of records, reflecting the core diagnostic and electrical characterisation methods. C25B (electrolytic production of compounds) and G01M (testing machine and structural balance) are also represented, indicating coverage of balance-of-plant and mechanical test rigs. B64C (aeroplanes and helicopters) appears in a single record, marking an isolated aerospace application.
↗ 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.
Ground stations and methods for PEM fuel cell powe…
Ground stations and methods for pre-flight health and safety check of PEM fuel cell powered unmanned aerial vehicles are disclosed. The ground stations are capable of reconditioning UAV fuel cell stacks and refilling the hydrogen supply. The methods permit the checking and returning of UAVs back into flight service within a few minutes. (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Ground stations and methods for PEM fuel cell powe… | 48 |
| 2 | Methods and apparatus for end-of-line testing of f… | 11 |
| 3 | Methods and apparatus for end-of-line testing of f… | 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.
Greenlight Innovation Corp
Greenlight Innovation Corp accounts for 5 patent families, covering G01R (electric and magnetic measurement), H01M (fuel cells), and C25B (electrolytic production of compounds). This breadth across measurement and electrochemical classes reflects a test-platform approach that spans electrical characterisation, cell-level diagnostics, and balance-of-plant validation. Applicant-level momentum data is not available for this evidence set.
families: 5Intelligent Energy Ltd
Intelligent Energy Ltd holds 1 patent family, with technology emphasis in B64C (aeroplanes and helicopters) and H01M (fuel cells), suggesting its single filing addresses airborne or unmanned-aerial-vehicle fuel cell diagnostics rather than stationary or automotive test equipment. This positions it in an adjacent segment with minimal overlap with the leader’s core claims. Applicant-level momentum data is not available for this evidence set.
families: 1Frequently asked questions
The current indexed corpus contains 6 patent families. This is a very small corpus, and the field is dominated by a single specialist applicant.
Greenlight Innovation Corp is the clear leader with 5 patent families. Intelligent Energy Ltd holds the remaining 1 patent family, making this a two-player field with no other indexed applicants.
Europe (EPO), the United States, and WIPO PCT each account for 2 patent records. China, Japan, Korea, and other major markets do not appear in the current evidence, which may represent unprotected gaps.
The field is classified as Decline, with annual filings having eased back from the 2021 peak. All 5 families from the peak year were filed by Greenlight Innovation Corp, and no new families have been indexed since.
No co-applicant pairs are present in the current evidence. Both active filers have pursued fully independent IP strategies, with no consortium, joint-venture, or university co-filings detected.
The aerospace intersection (B64C, aeroplanes and helicopters) is the most sparsely covered branch with only 1 record, pointing to airborne and UAV fuel cell diagnostics as an under-served area. Mechanical structural integrity testing (G01M) is also relatively sparse compared to the visible electrical and electrochemical classes.
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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.
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