Soft Robot Manipulator Design Patents: Who Leads, Trends 2026
- China dominates the filing office split. of the tracked records were filed at the China National IPO, versus a combined handful at the US and WIPO — this is presently a Chinese-university research field, not a global corporate race.
- Filing peaked in 2024, then the pipeline goes quiet. six families published that year against zero at the 2022 midpoint, so momentum is recent and concentrated rather than steadily built.
- Every record sits in a single IPC subclass. all fourteen families classify under B25J (manipulators & robots), meaning the technical differentiation is happening inside actuator and gripper claims, not across classification boundaries.
A small, young, China-centred field
Soft robot manipulator design covers pneumatic soft actuators, compliant grippers and continuum manipulators built to grasp or manipulate objects without rigid linkages. The tracked corpus is small — 14 patent families published between 2015 and mid-2026 — which puts this technology at an early, pre-consolidation stage rather than a mature, heavily litigated one. Filing did not begin ramping until after 2022, and 2024 is the peak year so far with six families, so the bulk of the documented activity is recent.
Because publication lags filing by roughly 18 months, the apparent drop-off into 2025 and 2026 understates real filing activity in those years rather than reflecting a genuine slowdown. Readers should treat the most recent two years as provisional counts that will rise as later publications land.
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Filing trend and technology composition
The filing curve and the IPC breakdown together show a field that is narrow in classification but recently active in volume.
Flat, then a 2024 spike
Filings sat at zero through the 2017-2022 window before climbing to a peak of six families in 2024. That shape is consistent with a small number of research groups entering the space in the same short window rather than a sustained industry build-out.
Single-subclass concentration
All 14 families classify under B25J, covering manipulators, grippers and hands. There is no meaningful spread into adjacent subclasses such as actuator-specific or control-specific codes, which suggests filers are claiming the mechanical actuator and gripper structures directly rather than the control algorithms or materials layered on top.
Shares are the percentage of the 14 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Soft Robot Manipulator Design with Eureka
This page is one run against one query. Ask Eureka your own question about soft robot manipulator design and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records anchor the pneumatic actuator claims
Customisable-shape pneumatic soft actuator and soft robot (WO2025256086A1, Hunan University)
The filing describes a pneumatic soft actuator built from a gas-driven deforming element with an internal cavity, an embedded rod structure with multiple inserted rods, and separate shape-customisation pieces mounted on at least two of those rods. The shape pieces constrain how the deforming element and base flex, letting the same actuator body be reconfigured for different grasping or manipulation tasks, while the rigid-soft coupling is claimed to raise the payload the actuator can carry.Abstract condensed from the original filing language.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | CN110315571A | 一种机器人装配姿态纠偏的软体致动器控制方法 | 5 |
| 2 | CN110962147A | 多级变刚度气动软体执行器 | 4 |
| 3 | CN112677169A | 一种多自由度气动软体执行器 | 3 |
| 4 | CN110281256A | 一种基于气动软体致动器的软体抓手及其制造方法 | 2 |
| 5 | CN120134344A | 一种对数螺旋形的双向弯曲气动软体执行器及软体机器人 | 1 |
| 6 | CN119388401A | 气动软体致动器的无传感器控制方法、装置、气动软体致动器及电子设备 | 1 |
| 7 | CN118493362A | 一种外形可定制的气动软体执行器、软体机器人 | 1 |
| 8 | CN118617441A | 一种模块化的变刚度气动软体执行器、软体机器人 | 1 |
Citation counts inside this corpus skew toward older filings simply because they have had longer to be cited; treat them as a signal of influence on later filers, not of current commercial weight.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Publication numbers are shown where the record carries one (8 of 8 rows); clicking a row searches Eureka by that number.
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Three patterns stand out once the family counts and office split are read together.
This is a China-first filing pattern
Ten of the fourteen tracked families were filed in China, with only two each at the US and via WIPO's PCT route. Any competitive read of this space needs Chinese-language prior art searched directly rather than relying on English-language abstracts alone.
Activity is recent and short-lived so far
The jump from zero filings at the 2022 midpoint to six in 2024 marks a sudden entry rather than gradual growth. Because of publication lag, it is too early to tell whether 2024 was a one-off cluster or the start of a sustained trend.
Claims cluster on mechanical structure
Every family in this dataset sits in B25J, the manipulators-and-robots subclass. No records here spread into control-software or materials-specific classifications, indicating the claim activity to date is about the physical actuator and gripper geometry.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to soft robot manipulator design, with the prior art for and against each one.
A field of Chinese research universities, not yet corporate
The assignee list is dominated by university labs, with recent-year momentum flat across the board rather than concentrated in one leader.
Momentum has stalled across the board
Every tracked assignee, including Hunan University and Zhejiang University, shows zero filings in the latest year, with Hunan University down -100% year-on-year. This is consistent with the broader dataset pattern of a 2024 peak followed by an as-yet-unpublished pipeline rather than genuine exit from the field.
No single assignee dominates the family count
The named assignees span Hunan University, Southwest Jiaotong University, Zhejiang University of Technology, Purdue Research Foundation, Tsinghua Shenzhen International Graduate School and Zhejiang University. Purdue Research Foundation is the one non-Chinese name in the set, indicating limited but real US academic interest.
Low volume per assignee, no dominant filer
With only 14 families spread across six or more named organisations, no single lab has built a defensive filing wall. That leaves room for a new entrant to establish a position without first clearing a dense thicket held by one player.
| Assignee | Recent year | YoY |
|---|---|---|
| Hunan University | 0 | -100% |
| Southwest Jiaotong University | 0 | — |
| Zhejiang University of Technology | 0 | — |
| Purdue Research Foundation | 0 | — |
| Tsinghua Shenzhen International Graduate School | 0 | — |
| Zhejiang University | 0 | — |
| Jilin University | 0 | — |
Where to take this analysis
The dataset points to a narrow, recently active field where the mechanical claim space is still open outside the core pneumatic actuator design.
Search the Chinese-language prior art directly
With ten of fourteen families filed in China, an English-only prior art search will miss most of the relevant claim scope. Run searches against the original Chinese filings before drafting new claims in this area.
Run a prior art search in EurekaWatch for the 2025-2026 publication catch-up
The apparent drop after 2024 is largely a publication-lag artefact. Recheck the filing trend in six to twelve months once later applications from the same window have published.
Track this landscape in EurekaMap the under-claimed branches before drafting
Variable-stiffness control and tactile-integrated grippers sit outside the dense B25J actuator cluster in this dataset. Confirm freedom to operate there before committing claim language.
Explore white space in EurekaCommon questions about soft robot manipulator patents
The tracked dataset shows a set of Chinese research universities as the main filers, including Hunan University, Southwest Jiaotong University, Zhejiang University of Technology, Tsinghua Shenzhen International Graduate School and Zhejiang University, alongside Purdue Research Foundation as the sole non-Chinese assignee. No single organisation holds a dominant share of the fourteen tracked families. This is a research-lab-driven field rather than one led by an established robotics manufacturer, at least in the records captured here.
The data shows filings at zero through 2022 before jumping to six families in 2024, the peak year in the dataset. That pattern looks like several research groups entering the space within a short window rather than one company scaling up. Because patent publication typically lags filing by around 18 months, it is not yet possible to tell from public data whether that momentum continued into 2025 and 2026 or tailed off.
Ten of the fourteen tracked families were filed in China, so the pneumatic soft actuator and gripper structures claimed under IPC class B25J are most crowded there. Branches such as variable-stiffness actuator control, tactile-feedback integration and continuum manipulator kinematics show comparatively little dedicated claim activity in this dataset. A first claim in those adjacent areas is less likely to collide directly with existing families than one aimed at the core pneumatic actuator geometry.
WO2025256086A1, filed by Hunan University, claims a pneumatic soft actuator that uses a gas-driven deforming element combined with an embedded rod structure and separate shape-customisation pieces mounted on the rods. The shape pieces constrain how the actuator body flexes, allowing the same base actuator to be reconfigured for different grasping tasks by swapping the customisation pieces rather than the actuator itself. Its claims are most likely to affect designs that combine a single deformable pneumatic body with interchangeable rigid or semi-rigid constraint elements to reconfigure grip geometry.
Not yet, by volume: fourteen tracked families is a small corpus compared with more mature robotics sub-fields, and all of them classify under a single IPC subclass, B25J. The concentration is narrow rather than deep — every record sits in the same manipulator classification, but no single assignee has built a broad defensive portfolio around it. That combination suggests real room for a new filer to stake out claims in adjacent branches, provided the Chinese-language prior art is searched carefully first.
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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.