Cell-to-Body Integration Patents: Leaders, Trends & White Space 2026
- Fragmented at the top. the leading assignee holds 82 records and the ranked top 5 combine for just 7.4% of all 4,843 records in scope — no single filer controls the claim space.
- Filing has cooled from its 2021 peak. activity ran from 332 records in 2021 down to 195 in 2024, a documented -41% over that span, though 2025-2026 figures are still filling in.
- Structural battery claims sit alongside a much larger materials-testing corpus. H01M (batteries, cells & fuel cells) accounts for only 6.1% of the 4,843 records, meaning most of the surrounding art is filed under adjacent classification, not battery-specific codes.
Filing growth compares 2021 (332 records) with 2024 (195) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 4,843 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Cell-to-body integration removes the intermediate battery pack enclosure and lets individual cells, or cell blocks, serve as part of the vehicle’s load-bearing floor structure. The engineering problems that follow are specific: cell fixation without a rigid pack housing, adhesive selection that survives crash loads and thermal cycling, load path design through the cell layer itself, and manufacturing tolerance stack across cells that were never meant to be structural. This dataset pulls 4,843 published records filed between 2015 and mid-2026 that touch these problems directly.
Because publication trails filing by roughly 18 months, the 2025 and 2026 counts in the trend chart are undercounts by construction — they will keep rising as later filings publish. Read the recent-year decline as a floor, not a ceiling.
Filing trend and technology composition
Two views of the same 4,843 records: how filing activity has moved year over year, and which technical classes the claims actually sit in.
Filing trend: a 2021 peak, then a documented pullback
Filings rose to a peak of 332 records in 2021, then declined to 195 by 2024 — a confirmed -41% over that three-year window. 2025 and 2026 figures will continue to fill in as later filings publish, so treat the most recent bars as provisional rather than a confirmed slowdown.
IPC composition: battery-specific codes are a minority
G01N (material analysis & testing) leads at 31.1% of the 4,843 records, with C12N, A61K and C12Q close behind — reflecting how much of this search space overlaps general materials and bio-analytical classification. H01M, the classification most directly tied to battery cells and fuel cells, covers only 6.1% of records, a reminder that structural-battery claims are frequently filed and classified under adjacent codes rather than battery-specific ones.
Shares are the percentage of the 4,843 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Cell-to-Body Integration for Vehicle Floor Structures with Eureka
This page is one run against one query. Ask Eureka your own question about cell-to-body integration for vehicle floor structures and every answer comes back with the patent numbers behind it.
Try EurekaA representative claim and the most-cited prior art
US11139520B2 — Cell block with cell fixation for a battery and method of assembling a cell block
Discloses a cell block for a battery with a box-shaped, one-side-open housing into which battery cells are fitted, and a separate cell fixation piece pushed into the open side to hold the cells in place and partially close the housing. The fixation piece includes bond openings for post-assembly access to the cells and a projecting collar feature.Filed by LISA Dräxlmaier GmbH, published 2021-10-05.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20040072278A1 | Microfluidic particle-analysis systems | 873 |
| 2 | WO2001040309A2 | Anti-prostate stem cell antigen (PSCA) antibody compositions and methods of use | 589 |
| 3 | WO2012083225A2 | System and methods for massively parallel analysis of nycleic acids in single cells | 568 |
| 4 | US20030230443A1 | Advanced composite hybrid-electric vehicle | 407 |
| 5 | US20140057799A1 | System and Methods for Massively Parallel Analysis of Nucleic Acids in Single Cells | 406 |
| 6 | US20040229349A1 | Microfluidic particle-analysis systems | 359 |
| 7 | US6821740B2 | Flow cytometric methods for the concurrent detection of discrete functional conformations of PRB in single ce… | 347 |
| 8 | WO1993003151A1 | Treatment of cell populations | 344 |
| 9 | US20130171621A1 | Methods of in situ detection of nucleic acids | 318 |
| 10 | WO2013059343A1 | Intracellular delivery | 301 |
Citation counts favour older records simply because they have had more time to accumulate citations inside the searched corpus — treat this table as a map of influence, not of current relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for a filing decision
Three findings that shape where a new filing would sit relative to existing art.
No single filer dominates cell-to-body claims
With the leader at 82 records and the top 5 combined controlling just 7.4% of the 4,843 records in scope, this is not a field where one company's patent wall forces a design-around. The ranked leaders account for a modest share of the whole, and the top 10 combined still sit at only 12.1%.
Activity has pulled back from its 2021 peak
Filings peaked at 332 records in 2021 and had fallen to 195 by 2024, a confirmed -41% over that span. Because publication lags filing by around 18 months, 2025-2026 counts are still incomplete and should not be read as continuing the decline.
Structural battery claims spread across adjacent codes
Only 6.1% of the 4,843 records carry the H01M battery-cell classification, while G01N, C12N and A61K each cover a larger share. A search strategy limited to battery-specific IPC codes would miss most of the relevant prior art in this space.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to cell-to-body integration for vehicle floor structures, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| GammaDelta Therapeutics Ltd | F-star Therapeutics Ltd | 19 |
| President and Fellows of Harvard College | Children's Medical Center Corporation | 15 |
| Massachusetts Institute of Technology | Broad Institute, Inc. | 15 |
| President and Fellows of Harvard College | Brigham and Women's Hospital | 14 |
| President and Fellows of Harvard College | Joslin Diabetes Center, Inc. | 13 |
| President and Fellows of Harvard College | Broad Institute, Inc. | 7 |
| The Regents of the University of California | NANOVALENT PHARMACEUTICALS INC | 7 |
| Massachusetts Institute of Technology | Brigham and Women's Hospital | 7 |
The dataset records only 10 co-assignee pairs overall, and the strongest of these sit outside the battery-structure core of the search — co-filing is not yet a meaningful pattern in this niche.
Who is filing, and where the field is still open
The ranked leaders hold a modest share of total filings, leaving room for new entrants to stake out specific sub-problems rather than compete head-on with an incumbent portfolio.
The top-ranked assignee still holds a small overall share
At 82 records out of 4,843, the leading assignee's position is real but not commanding — it does not translate into control over the wider claim space, especially once adjacent IPC classes are counted.
A steep drop-off past the top 5
Filing counts fall from 59 at fifth place to 39 at tenth, and the ranking runs to 100 companies — evidence of a fragmented field with many single- and low-digit filers rather than a small oligopoly.
Momentum has cooled even among established filers
Several of the most active historical assignees show zero or minimal filings in the latest tracked year, consistent with the broader 2021-2024 pullback rather than any single company exiting the space.
| Assignee | Recent year | YoY |
|---|---|---|
| The Regents of the University of California | 1 | 0% |
| President and Fellows of Harvard College | 0 | — |
| GammaDelta Therapeutics Ltd | 0 | -100% |
| Schering Corporation | 0 | — |
| 10x Genomics, Inc. | 0 | -100% |
| Massachusetts Institute of Technology | 0 | — |
| Memorial Sloan Kettering Cancer Center | 0 | -100% |
| Google LLC | 0 | -100% |
Where to take this analysis
The dataset points to a fragmented field with a cooling filing rate and classification spread beyond battery-specific codes — three directions worth following up.
Map claims against the H01M minority
Since only 6.1% of records sit in H01M, pulling the full claim text of records in G01N, C12N and A61K that reference battery structures would surface prior art a battery-only search misses.
Explore adjacent classificationsWatch the 2025-2026 publication catch-up
The 2021-2024 pullback is confirmed, but the true 2025-2026 filing rate will not be visible until those applications finish publishing on their normal 18-month lag.
Track filing trend updatesStress-test white space claims
Sub-areas like tolerance-stack compensation and adhesive selection show thinner filing density in this corpus — worth a focused freedom-to-operate check before committing claim language there.
Run a white space searchCommon questions on cell-to-body integration patents
The leading assignee in this dataset holds 82 of the 4,843 records in scope, with the field dropping off sharply after that — fifth place sits at 59 records and tenth place at 39. No filer holds a dominant share: the top 5 combined account for just 7.4% of all records, and the top 10 for 12.1%. This means the field is fragmented rather than controlled by one or two incumbents, and a new entrant is unlikely to face a single blocking portfolio.
Filings peaked at 332 records in 2021 and fell to 195 by 2024, a confirmed -41% decline over that three-year window. However, because publication lags filing by roughly 18 months, the 2025 and 2026 figures in any trend chart are necessarily incomplete and will rise as later filings publish. It is accurate to say the field pulled back from its 2021 peak through 2024; it is premature to call the most recent years a continuing slowdown.
US11139520B2, assigned to LISA Draexlmaier GmbH and published in 2021, claims a cell block assembly consisting of a box-shaped, one-side-open housing into which battery cells are fitted, plus a separate cell fixation component pushed into that open side to hold the cells and partially close the housing. The fixation piece includes bond openings for post-assembly cell access and a projecting collar feature. It is a mechanical assembly and fixation patent, not a claim over cell chemistry or the broader concept of structural battery integration, so its blocking effect is limited to that specific fixation-and-housing mechanism.
Battery-specific classification (H01M, batteries, cells & fuel cells) covers only 6.1% of the 4,843 records in this dataset. The larger shares sit in G01N (material analysis & testing, 31.1%), C12N, A61K and C12Q — reflecting that much of the relevant prior art around materials, adhesives and testing methods for this application is not filed or classified under battery-specific codes. A prior-art search limited to H01M would miss most of the corpus.
With filing density concentrated around cell fixation and housing mechanisms, sub-areas such as adhesive selection for crash-load durability, manufacturing tolerance stack compensation across structural cells, and single-cell replacement without full pack disassembly show comparatively thinner claim coverage in this corpus. These are not guaranteed-open areas — a freedom-to-operate search is still needed — but they represent branches adjacent to the dense core where new claim language has more room to differentiate.
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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.
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.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.