Hydrogen Storage (Metal Hydride/Compressed) Patent Landscape
The hydrogen storage field is in active growth, with Toyota Motor Corporation holding the largest portfolio among a moderately concentrated set of automotive, energy, and research applicants. China is by far the dominant filing jurisdiction, and pressure-vessel and inorganic-chemistry classes together define the core technology space.
Toyota leads a moderately concentrated field of automotive and energy incumbents
Toyota Motor Corporation holds the top position with 283 patent families, ahead of Energy Conversion Devices Inc (224) and Honda Motor Co Ltd (182). The top five filers — Toyota, Energy Conversion Devices, Honda, Hyundai Motor, and the French Alternative Energies and Atomic Energy Commission — together account for 25% of the combined output of the hundred largest filers, signaling meaningful but not extreme concentration.
A clear tier gap exists between the top three (183–283 patent families each) and the next tier, which clusters between 89 and 129 patent families. Below rank ten, counts fall rapidly toward the 50–80 range, indicating a long tail of smaller or more specialized applicants.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Toyota Motor Corporation | 283 | |
| 2 | Energy Conversion Devices Inc | 224 | |
| 3 | Honda Motor Co Ltd | 182 | |
| 4 | Hyundai Motor Company | 129 | |
| 5 | French Alternative Energies and Atomic Energy Commission (CEA) | 128 | |
| 6 | Toyota Industries Corporation | 89 | |
| 7 | Ovonic Battery Company Inc | 80 | |
| 8 | GM Global Technology Operations LLC | 74 | |
| 9 | Asia Pacific Fuel Cell Technologies Ltd | 70 | |
| 10 | Zhejiang University | 61 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Johnson Matthey PLC | 59 | |
| 12 | Hydrexia (Shanghai) Co Ltd | 57 | |
| 13 | Hydro-Quebec | 56 | |
| 14 | Nissan Motor Co Ltd | 52 | |
| 15 | Panasonic Holdings Corporation | 52 | |
| 16 | French National Centre for Scientific Research (CNRS) | 51 | |
| 17 | Vodik Labs LLC | 50 | |
| 18 | Taiheiyo Cement Corporation | 48 | |
| 19 | Kawasaki Heavy Industries Ltd | 47 | |
| 20 | CHINA PETROLEUM & CHEMICAL CORP | 46 |
Toyota’s position, reinforced by a collaboration network with Toyota Industries Corp and Toyota Central R&D Labs, reflects a sustained, integrated R&D commitment across fuel-cell systems and pressure-vessel storage — not merely early-period accumulation.
Filing counts for the most recent 18–24 months are understated due to standard patent publication lag; any apparent softening in 2025–2026 data should be treated as incomplete rather than a real decline. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing volumes have risen sharply since 2019; pressure vessels and inorganic chemistry dominate the technology mix
The annual trend and technology-branch distribution together reveal both the pace of market expansion and where inventive effort is concentrated — and where it is not.
Annual filing trend
Annual filings rose steeply from 185 in 2017 to a recorded high of 829 in 2024, a 78% increase over the recent window. The step-change acceleration began in 2019 and continued through 2024. The 2025 and 2026 figures are substantially incomplete due to publication lag and should not be read as a decline.
↗ Hover for values · click a bar to ask EurekaTechnology composition
F17C (pressure vessels and gas storage) is the dominant class, followed closely by C01B (non-metallic elements and inorganic compounds, covering hydrogen production and metal hydride chemistry) and H01M (batteries, cells, and fuel cells). These three classes together represent the core of both compressed and metal-hydride storage activity. Lower-volume branches such as B01J (catalysis), C22C (alloys), and B22F (powder metallurgy) mark adjacent areas with comparatively sparse coverage.
↗ 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.
Hydrogen storage material, method for producing th…
A hydrogen storage material of the present invention comprises a plurality of planar molecular layers stacked, and a particle being inserted into the planar molecular layers to define an interlayer distance between the planar molecular layers. Because the hydrogen storage material of the present invention has a sufficient hydrogen storage capacity, it is… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | System for hydrogen generation | 341 |
| 2 | Cartridge for gas generator | 286 |
| 3 | Miniature hydrogen generator | 278 |
| 4 | Enhanced charge retention electrochemical hydrogen… | 193 |
| 5 | Process for making a hydrogen generation catalyst | 184 |
| 6 | Hydrogen storage, distribution, and recovery system | 183 |
| 7 | Hydrogen storage, distribution, and recovery system | 172 |
| 8 | Catalytic hydrogen storage electrode materials for… | 169 |
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.
What the patent structure means for R&D investment decisions
The combination of growth-stage dynamics, moderate concentration, active cross-institutional collaboration, and strong Chinese jurisdictional presence shapes where barriers are high and where entry remains feasible.
Growth stage: annual filings still rising with no evidence of peak
The lifecycle evidence classifies this field as Growth, with annual filings rising and the most recent years understated by publication lag. The 78% increase in the recent filing window confirms that inventive activity is accelerating rather than consolidating. New entrants can still establish meaningful positions, but core pressure-vessel and metal-hydride chemistry claims are increasingly dense.
Growth stageModerate concentration with a clear leader tier and a long specialist tail
The top five filers hold 25% of the hundred largest filers’ combined output — concentrated enough to create freedom-to-operate considerations in core classes, but not so dominant as to foreclose new entrants. The long tail of applicants in the 50–89 patent-family range includes universities and specialist firms that often hold high-value, narrowly focused portfolios worth monitoring for licensing or partnership opportunities.
Moderate concentrationAutomotive OEM pairs and public-research networks are the most active co-filers
The most active co-filing pair is Hyundai Motor and Kia Corporation with 88 joint patent families, followed closely by Toyota Motor Corporation and Toyota Industries Corp with 84. On the research side, the French Alternative Energies and Atomic Energy Commission co-files with the French National Centre for Scientific Research (16 families), with McPhy Energy (11), and with two Lyon-based academic institutions (6 each). Honda Motor co-files with Japan Heavy Chemical Industries (11 families). These clusters indicate that systems integration and materials science are being developed through tight OEM–supplier and government-lab–university linkages.
OEM & lab alliancesChina dominates filings; the US, Japan, and Europe form a secondary tier
China accounts for the largest share of patent records by a wide margin, with the United States, Japan, Europe (EPO), WIPO, and South Korea forming a competitive secondary tier. Canada and Australia show meaningful but smaller activity. Emerging markets — India, Brazil, and Southeast Asia — have minimal coverage to date, representing potential future filing fronts as hydrogen infrastructure investment expands globally.
China-dominant, globalGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| Hyundai Motor Company | Kia Corporation | 88 |
| Toyota Motor Corporation | Toyota Industries Corporation | 84 |
| French Alternative Energies and Atomic Energy Commission (CEA) | French National Centre for Scientific Research (CNRS) | 16 |
| Honda Motor Co Ltd | Japan Heavy Chemical Industries Co Ltd | 11 |
| French Alternative Energies and Atomic Energy Commission (CEA) | McPhy Energy | 11 |
| Hyundai Motor Company | Korea Institute of Science and Technology (KIST) | 10 |
| Toyota Motor Corporation | Toyota Central R&D Labs Inc | 7 |
| Energy Conversion Devices Inc | Shell International Research | 6 |
| French Alternative Energies and Atomic Energy Commission (CEA) | Institut National des Sciences Appliquees de Lyon (INSA Lyon) | 6 |
| French Alternative Energies and Atomic Energy Commission (CEA) | Claude Bernard University Lyon 1 | 6 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Toyota leads on breadth; Energy Conversion Devices and Honda hold deep materials and fuel-cell portfolios
The top applicants differ in their technology emphasis: Toyota spans fuel cells, pressure vessels, and inorganic chemistry, while Energy Conversion Devices concentrates on electrode materials and hydride chemistry. Momentum trajectories diverge sharply across the field.
Toyota Motor Corporation
Toyota holds 283 patent families — the largest portfolio in scope — with technology emphasis spanning fuel-cell systems (H01M 8), pressure-vessel storage (F17C 11), and hydrogen chemistry (C01B 3). Recent filing momentum is strongly positive at +75% versus the prior three-year period, indicating that Toyota is actively expanding its position rather than resting on an established base. Tight co-filing with Toyota Industries Corp (84 joint families) and Toyota Central R&D Labs (7 joint families) reinforces an integrated systems approach.
patent families: 283Honda Motor Co Ltd
Honda holds 182 patent families with the heaviest emphasis on fuel-cell systems (H01M 8, 130 records), followed by hydrogen chemistry (C01B 3, 105 records) and pressure-vessel storage (F17C 11, 75 records). Recent momentum shows a significant contraction of -64% versus the prior period, suggesting either a strategic portfolio consolidation or a shift of R&D effort away from patenting in this space. Co-filing with Japan Heavy Chemical Industries (11 families) points to continued materials-level collaboration.
patent families: 182| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Toyota Motor Corporation | 35 | ▲ +75% |
| Honda Motor Co Ltd | 5 | ▼ -64% |
| Hyundai Motor Company | 28 | ▼ -33% |
| French Alternative Energies and Atomic Energy Commission (CEA) | 6 | ▲ new entrant |
| Zhejiang University | 16 | ▲ +7% |
Under-served adjacent branches: catalysis, alloy design, powder metallurgy, and pipeline transport
Several IPC branches sit adjacent to the dominant storage classes but carry comparatively sparse patent coverage relative to their technical relevance. These observations highlight areas where entry barriers may be lower, though each requires validation against specific competitive and commercial context.
B01J · Catalytic processes for hydride activation
B01J (chemical and physical processes, including catalysis) holds 1,020 patent records — meaningful in absolute terms but representing only 6% of the whitespace branches — and is sparse relative to the dominant F17C and C01B classes. Catalyst design for metal hydride absorption/desorption kinetics is a well-recognized technical bottleneck: improving reaction rates directly enables faster refueling cycles and wider operating temperature ranges. An entrant with heterogeneous catalysis expertise could develop differentiated positions in this branch without directly competing in the most densely filed pressure-vessel or hydrogen-chemistry claims.
Search this in Eureka →B22F · Powder metallurgy for hydride material fabrication
B22F (powder metallurgy) carries 443 patent records and a 2% share among the adjacent branches, indicating relatively thin coverage for a process class directly relevant to manufacturing metal hydride storage materials. Powder-metallurgy techniques govern particle size, surface area, and cycling stability of hydride alloys — all of which affect storage capacity and durability. Applicants with advanced sintering, ball-milling, or additive manufacturing (B33Y is also sparse with only 11 records) capabilities may find this an accessible route to establish IP in fabrication processes rather than in alloy composition per se.
Search this in Eureka →How leading applicants differ across pressure-vessel, fuel-cell, and hydride-chemistry routes
Route coverage across the main technology branches in the current evidence set.
| Player | C01B 3 · Non-metallic elements & inorganic compounds | F17C 13 · Pressure vessels & gas storage | F17C 11 · Pressure vessels & gas storage | H01M 8 · Batteries, cells & fuel cells | F17C 1 · Pressure vessels & gas storage |
|---|---|---|---|---|---|
| Energy Conversion Devices Inc | Strong · 267 | Absent | Moderate · 123 | Strong · 170 | Emerging · 14 |
| Toyota Motor Corporation | Strong · 114 | Strong · 102 | Strong · 120 | Strong · 126 | Moderate · 28 |
| Honda Motor Co Ltd | Strong · 105 | Strong · 73 | Strong · 75 | Strong · 130 | Emerging · 12 |
| Asia Pacific Fuel Cell Technologies Ltd | Strong · 52 | Absent | Strong · 58 | Strong · 59 | Moderate · 20 |
| Hyundai Motor Company | Absent | Strong · 63 | Strong · 34 | Strong · 40 | Moderate · 16 |
| French Alternative Energies and Atomic Energy Commission (CEA) | Absent | Absent | Strong · 116 | Absent | Emerging · 18 |
| Toyota Industries Corporation | Absent | Absent | Strong · 85 | Strong · 46 | Absent |
Frequently asked questions
Toyota Motor Corporation leads with 283 patent families, ahead of Energy Conversion Devices Inc (224) and Honda Motor Co Ltd (182). Toyota’s portfolio spans fuel-cell systems, pressure-vessel storage, and hydrogen chemistry, and its recent filing momentum is up 75% versus the prior three-year period.
Annual filings rose 78% over the recent multi-year window, from 185 recorded families in 2017 to 829 in 2024. The lifecycle evidence classifies the field as Growth, with annual filings still rising. The 2025 and 2026 figures are incomplete due to publication lag.
China is the dominant filing jurisdiction by a wide margin. The United States, Japan, Europe (EPO), WIPO, and South Korea form a substantial secondary tier, with Canada and Australia also showing meaningful activity.
F17C (pressure vessels and gas storage) is the leading class, followed by C01B (non-metallic elements and inorganic compounds, covering hydrogen and metal hydride chemistry) and H01M (batteries, cells, and fuel cells). These three classes define the core of both compressed and metal-hydride storage activity.
The most active co-filing pairs are Hyundai Motor and Kia Corporation (88 joint patent families) and Toyota Motor Corporation and Toyota Industries Corp (84). On the research side, the French Alternative Energies and Atomic Energy Commission co-files most actively with the French National Centre for Scientific Research (16 families) and with McPhy Energy (11 families).
B01J (catalytic processes relevant to hydride kinetics), B22F (powder metallurgy for hydride fabrication), C22C (alloy composition), and F17D (pipeline transport) are branches with relatively sparse patent coverage compared to the dominant storage classes. These represent areas where entry barriers may be lower, though each should be evaluated against specific technical and commercial context before treating them as confirmed opportunities.
Ready to map your own hydrogen storage landscape?
Join 18,000+ innovators using PatSnap Eureka to map any technology landscape: search 2B+ patents and papers, surface key assignees, and generate a report like this in minutes.
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.