Shape Memory Alloy Patents: Top Companies & Filing Trends 2026
- Filing has cooled since its 2020 peak. 74 families in 2020 fell toward single digits by the most recent partial year, with 2022's midpoint of 48 already showing the decline underway.
- Actuation, not metallurgy, dominates the claim space. F03G (spring/weight & misc. motors) appears in 931 records, ahead of C22F alloy-treatment (796) and C22C alloy composition (667) — most filings protect how the alloy is used, not how it is made.
- The most-cited prior art is two decades old. The top-cited record, an endoscope bending mechanism, dates back to before this window opened, meaning current filers are building on foundational patents rather than competing with fresh blocking art.
Filing growth compares 2021 (71 records) with 2024 (34) — 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 1,912 records in scope (CR5), not by the ranked leaders only.
What the shape memory alloy patent record shows
Shape memory alloys sit at an unusual intersection of metallurgy and mechanism design. The search corpus behind this page combines alloy-composition and heat-treatment claims (C22C, C22F) with the mechanical and thermal actuators built on top of them (F03G), plus a substantial secondary cluster in medical devices (A61F, A61L, A61B) and optical or photographic apparatus (G02B, G03B). That spread across eight IPC subclasses signals a technology that gets re-patented every time it is dropped into a new product category, rather than one contained inside a single industrial niche.
Filing offices skew toward the United States, Japan and Europe, with China and the WIPO PCT route trailing. That distribution points to a technology whose commercial deployment — surgical instruments, aerospace actuators, eyewear frames — has historically concentrated in mature medtech and industrial manufacturing hubs rather than in high-volume Chinese electronics filing patterns.
Filing trend and technology composition
1,912 patent families were published across the tracked window. The trend line and IPC split below show where the claim space has concentrated and where activity has slowed.
A declining filing curve after a 2020 peak
Filings rose from 45 in 2017 to a peak of 74 in 2020, then eased back through a 2022 midpoint of 48 toward single digits in the most recent, still-partial year. Because publication typically lags filing by around 18 months, the last one to two years understate real activity — but the multi-year downward slope from 2020 predates that lag effect and is a genuine signal.
Actuation claims outweigh alloy-composition claims
F03G (spring, weight and miscellaneous motor mechanisms) leads at 931 records, ahead of C22F non-ferrous treatment at 796 and C22C alloy composition at 667. The medical cluster (A61F, A61L, A61B) and optical cluster (G02B, G03B) are smaller but persistent, showing shape memory alloys have become a standard component choice in device engineering well beyond the metallurgy labs that originated the material.
Shares are the percentage of the 1,912 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Shape Memory Alloys with Eureka
This page is one run against one query. Ask Eureka your own question about shape memory alloys and every answer comes back with the patent numbers behind it.
Try EurekaThe patents everyone in this space cites
US8741076B2 — Apparatus and method of controlling phase transformation temperature of a shape memory alloy
A device and method for controlling a phase transformation temperature of a shape memory alloy is provided. The device includes a primary wire composed of the shape memory alloy, fixed at one end and free to displace at the other. An activation source thermally coupled to the wire causes it to reversibly cycle between Martensitic and Austenitic phases, while a loading element selectively increases tensile load on the wire above a threshold ambient temperature.Filed by GM Global Technology Operations LLC, published 2014-06-03 — sits just before this window but anchors much of the actuation-control art that follows it.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4930494A | Apparatus for bending an insertion section of an endoscope using a shape memory alloy | 680 |
| 2 | US5341818A | Guidewire with superelastic distal portion | 649 |
| 3 | US5876434A | Implantable medical devices of shape memory alloy | 477 |
| 4 | US6318070B1 | Variable area nozzle for gas turbine engines driven by shape memory alloy actuators | 457 |
| 5 | WO2013175197A1 | Shape memory alloy actuation apparatus | 416 |
| 6 | US5411476A | Superelastic guiding member | 411 |
| 7 | US20030069492A1 | Superelastic guiding member | 337 |
| 8 | US4505767A | Nickel/titanium/vanadium shape memory alloy | 322 |
| 9 | US6574958B1 | Shape memory alloy actuators and control methods | 315 |
| 10 | US5964770A | High strength medical devices of shape memory alloy | 271 |
Citation counts favour older records simply because they have had more time to be cited; treat this table as a map of foundational and influential art, not of current commercial importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the filing pattern actually tells you
Three read-throughs matter for anyone deciding whether to file, license or design around in this space.
The wave has crested
Filing volume peaked in 2020 and has declined through the 2022 midpoint toward the most recent partial year. This is consistent with a technology that reached a plateau in core alloy and actuator claims rather than one still expanding its claim frontier.
Mechanism claims outnumber material claims
More records claim the actuator or motor mechanism built around the alloy than claim the alloy composition itself. That suggests the base material science is comparatively settled, and the active competitive ground is in how the alloy is packaged into a moving part.
Collaboration is narrow and concentrated
Only ten co-assignee pairs appear across the whole corpus, and the strongest pair shares 15 families. Most filers in this space patent alone rather than through joint development structures, which narrows the field for anyone looking for existing licensing relationships to build on.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to shape memory alloys, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Cambridge Mechatronics Limited | TOPLISS RICHARD | 15 |
| Cambridge Mechatronics Limited | LEEDHAM ROBERT JOHN | 7 |
| Cambridge Mechatronics Limited | GREGORY THOMAS MATTHEW | 6 |
| Abbott Cardiovascular Systems Inc. | ABRAMS ROBERT M | 6 |
| Cambridge Mechatronics Limited | HOOLEY ANTHONY | 5 |
| Cambridge Mechatronics Limited | BROWN ANDREW BENJAMIN DAVID | 5 |
| GM Global Technology Operations LLC | Alloy Mechanics Inc. | 5 |
| ASE Technology Inc. | Efumei Precision Components Inc. | 5 |
Co-assignee activity is dominated by one recurring filer paired with several named inventors, rather than by cross-company joint ventures — a pattern typical of a single R&D team spinning out related filings.
Who holds the shape memory alloy claim space
Recent-year momentum figures show the leading historical filers have gone quiet: several of the most active assignees on record show zero filings in the latest year, with year-over-year declines of 100% where prior-year activity existed.
Historical leaders have stopped filing
Assignees that built substantial portfolios earlier in the window — spanning medical devices, aerospace and precision components — show no filings in the most recent year tracked, several with a full -100% year-over-year drop. This does not necessarily mean exit from the technology, but it does mean the active claim space is currently less contested at the top than the historical rankings suggest.
US, Japan and Europe anchor the record
The United States leads receiving-office volume at 593, followed by Japan at 342 and the European Patent Office at 307. WIPO PCT filings (180) and China (132) trail, indicating that international-route filing and Chinese domestic filing have been secondary strategies for most assignees in this dataset.
One filer anchors most joint activity
The strongest co-assignee relationship in the corpus links a single corporate filer to three named individual inventors across separate pairings, at 15, 7 and 6 shared families respectively. That pattern points to an internal inventor team rather than an external collaboration network.
| Assignee | Recent year | YoY |
|---|---|---|
| Cambridge Mechatronics Limited | 0 | -100% |
| The Boeing Company | 0 | — |
| Abbott Cardiovascular Systems Inc. | 0 | — |
| Hutchinson Technology Incorporated | 0 | -100% |
| SAES Getters S.p.A. | 0 | — |
| Furukawa Electric Co., Ltd. | 0 | — |
| TOKIN Corporation | 0 | — |
| GM Global Technology Operations LLC | 0 | — |
Where to take this analysis
The filing trend and IPC split point to specific next questions depending on whether you are clearing freedom to operate or scouting where to file.
Check the quiet leaders' full portfolios
Several historically active assignees show zero filings in the latest tracked year. Before assuming the field is open, check whether that reflects genuine exit, portfolio maturity, or a filing gap awaiting publication.
Explore assignee portfolios in EurekaMap the actuator-versus-alloy claim boundary
F03G mechanism claims and C22C/C22F material claims overlap in many families. A precise boundary map clarifies whether a new actuator design needs a material license, a mechanism license, or both.
Run a claim-boundary search in EurekaTest white space in optical and photographic overlap
G02B and G03B filings are a small fraction of the corpus relative to the medical and industrial clusters, suggesting SMA actuation in optical apparatus remains comparatively under-claimed.
Investigate optical SMA claims in EurekaCommon questions about shape memory alloy patents
The most-cited record in this corpus is a foundational endoscope-bending mechanism patent, followed by a superelastic guidewire patent and an implantable-device patent, all dating from the 1990s. These older, highly-cited filings function as the prior art base that later actuator and medical-device patents build on. Current leading assignees by volume include large industrial and medical device firms, though recent-year momentum data shows several of them have slowed or stopped filing altogether in the most recent tracked year.
No — filing activity peaked in 2020 at 74 families and has declined since, with the 2022 midpoint at 48 and volumes falling toward single digits by the most recent partial year. Because publication lags filing by roughly 18 months, the very latest year is always undercounted, but the multi-year downward trend from the 2020 peak predates that effect. This points to a technology whose core claim space in alloy composition and basic actuation has matured rather than one still in an early growth phase.
Mechanism and actuator claims under IPC class F03G are the largest single category at 931 records, ahead of non-ferrous metal treatment (C22F, 796) and alloy composition (C22C, 667). Medical device applications — implants, sterilisation and surgical instruments — form a meaningful secondary cluster, as does a smaller but persistent optical and photographic apparatus cluster. This distribution shows that most recent patenting activity protects how the alloy is deployed in a product rather than the base metallurgy itself.
The IPC composition data shows optical (G02B) and photographic apparatus (G03B) applications of shape memory alloys are comparatively thin relative to the medical and industrial clusters, suggesting under-claimed ground in camera and lens actuation mechanisms. Functional-fatigue prediction and low-hysteresis alloy tuning also appear less densely claimed than the core actuator mechanism art. Anyone evaluating this space should run a targeted search against these specific sub-branches rather than relying on the crowded F03G and C22C core.
US8741076B2, assigned to GM Global Technology Operations LLC, claims a specific method of controlling the phase transformation temperature of a shape memory alloy wire using a thermally-coupled activation source and a load element that increases tensile load above a threshold ambient temperature. It does not block shape memory alloy actuation generally — it blocks that specific temperature-control mechanism and its close variants. Designs that control transformation temperature through a different mechanism, such as direct resistive heating without the described loading element, would need a separate freedom-to-operate review rather than being automatically blocked by this claim.
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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.