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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/bridge-bearings-and-seismic-isolation-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Construction MaterialsBridge Bearing and Seismic Isolation Patents: Filing Trends and Leading Assignees
- Small, concentrated field. just 26 patent families sit inside this search, with filing activity still building toward a 2018 peak rather than tapering off.
- No single dominant filer. the strongest co-filing cluster is a three-person inventor group, not a corporate portfolio, alongside university and research-institute filers.
- Structural bearing IPCs outweigh vibration-damper IPCs. E04H and E01D together account for more records than F16F, meaning most claims are being written around the structure, not the damping element.
26
Published Records
US
Leading Jurisdiction
25
Active Filers Ranked
2018
Peak Filing Year
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Overview
What this landscape covers
This review pulls patent families filed against seismic isolation bearing, bridge bearing and lead rubber bearing terms, restricted to records that also address damping capacity, displacement capacity, elastomer aging, friction pendulum design or retrofit application. The IPC filter narrows the set to E04H9 (structures designed against seismic and dynamic loads), E01D19 (bridge equipment) and F16F15 (vibration-damping devices), which keeps out general elastomer or rubber-compounding patents that do not name a structural bearing application.
The result is a compact corpus of 26 families spanning 2015 to mid-2026. That size matters for how the numbers below should be read: a handful of filings moves a percentage point, and any single well-cited older patent can dominate the citation table without still governing current claim scope.
Filing activity and technology composition, 2015-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Bridge Bearings and Seismic Isolation covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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The Data
Filing trend and technology mix
Two views of the same 26-family dataset: annual filing counts, and how records split across IPC subclasses.
Filings by year
Activity opened at 2 filings in 2017, rose to a peak of 4 in 2018, then fell away through the middle of the window before turning up again — the 2022 midpoint shows zero filings, so growth since then is happening from a near-standing start. As with any dataset, the final year or two is undercounted because publication typically lags filing by around 18 months; 2026's single filing is a partial-year figure, not a slowdown.
IPC subclass composition
E04H (specialised buildings and structures against dynamic loads) leads at 18 of the records, closely followed by E01D (bridges) at 15 — many families sit in both, describing bearing systems installed on bridge structures. F16F (springs and vibration dampers) trails at 10, and F16C (shafts, bearings and couplings), E04B (building elements) and E02D (foundations) each appear in single digits, marking the thinner, more peripheral claim areas.
Shares are the percentage of the 26 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Bridge Bearings and Seismic Isolation covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
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The most-cited records in this corpus
Representative Filing
WO2020006850A1 — Uplift-resistant three-dimensional rubber friction pendulum isolation bearing
SOUTHEAST UNIVERSITY
Filed by Southeast University, this bearing pairs two opposed concave dishes with a rubber interlayer pad and friction sheets, connected through vertical disc springs and cross-cables between the dishes and two isolation plates. The stacked-cable arrangement is claimed to deliver staged horizontal isolation, vertical seismic isolation, and uplift resistance in a single unit.Abstract translated and condensed from the original filing for readability.
Highest-citation patents in the dataset
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5599106A | Ball-in-cone seismic isolation bearing | 86 |
| 2 | US20210301900A1 | A three-dimensional isolator with adaptive stiffness property | 73 |
| 3 | US20190194883A1 | Method for Improving Seismic Performance of Bridge by Using Beam Body and Energy Dissipation and Seismic Miti… | 34 |
| 4 | US6971795B2 | Seismic isolation bearing | 24 |
| 5 | US20040131287A1 | Seismic isolation bearing | 22 |
| 6 | KR1020010074179A | Multi-directional Seismic Isolation Devices | 19 |
| 7 | US6672763B1 | Compensating bearing | 18 |
| 8 | WO2001042593A2 | Seismic isolation bearing | 18 |
| 9 | CN202530371U | 摩擦摆减隔震球型支座 | 16 |
| 10 | WO2020006850A1 | 一种抗拔型三维橡胶摩擦摆隔震支座 | 10 |
Citation counts are drawn from within this searched corpus and skew toward older filings that have simply had more years to accumulate citations — treat them as a marker of influence on the field's vocabulary, not of current commercial relevance.
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. Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Bridge Bearings and Seismic Isolation covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the numbers say about the field
Three findings that shape how a freedom-to-operate or whitespace review should be scoped here.
Concentration
26 families
total corpus size
A small field with room left to claim
At 26 patent families across more than a decade, this is not a saturated area. The peak year (2018, 4 filings) was followed by a quiet stretch through 2022, and any new filing today is competing against a thin, unevenly distributed prior art base rather than a dense thicket.
Peak year 2018 = 4 filings
Filer structure
7 co-filings
strongest inventor pair
Individual inventors, not corporate portfolios, anchor the strongest cluster
The tightest co-assignee relationship in the dataset — Liang Zach and Lee George C, appearing together 7 times — reads as an individual inventor team rather than a single corporate assignee building a fenced portfolio. University and research-institute names appear elsewhere in the ranking but without comparable filing depth.
8 co-assignee pairs identified overall
Geography
US 8 · WIPO 7
top receiving offices
US and PCT filings lead, China and Korea close behind
United States receives the most filings (8), with PCT/WIPO applications close behind (7), then China (5) and South Korea (4). Australia and India each register a single filing, suggesting those markets have seen isolated retrofit or infrastructure-driven filings rather than sustained programs.
6 receiving offices represented
Eureka AI Agent
Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to bridge bearings and seismic isolation, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Bridge Bearings and Seismic Isolation covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Players
Who is filing, and where the claim space is still open
No single company dominates this dataset; the strongest links are between individual inventors and a handful of university and institute filers, with recent-year activity flat across the group.
Inventor cluster
LIANG ZACH + LEE GEORGE C
strongest co-filing pair
An individual inventor team, not a company, holds the tightest filing cluster
Liang Zach, Lee George C and Niu Tie Cheng appear together across multiple co-assignee pairs (7, 4 and 4 occurrences respectively), forming the densest filing relationship in the corpus. None of the three shows filings in the latest tracked year, consistent with a corpus where recent-year momentum is flat across every named party.
3-way co-filing cluster
Academic filers
Tongji University · SEU
university assignees present
Universities and research institutes hold isolated but technically detailed filings
Tongji University, China Railway Eryuan Engineering Group and the University at Buffalo's research foundation each appear as assignees, alongside Southeast University's representative filing on a three-dimensional friction pendulum bearing. These are single-institution filings rather than defended portfolios, which lowers the bar for a well-drafted design-around.
0 filings from any named assignee in the latest year
Momentum
0 latest-year filings
across every top assignee
No named assignee is currently active in the most recent filing year
Every top assignee tracked — the inventor cluster, both Chinese institutions and the US research foundation — shows zero filings in the latest year. Given the 18-month publication lag, this likely reflects pending disclosures rather than an abandoned field, but it also means no party currently holds visible first-mover claim momentum.
Recent-year momentum flat across all tracked assignees
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| LIANG ZACH | 0 | — |
| LEE GEORGE C | 0 | — |
| NIU TIE CHENG | 0 | — |
| Tongji University | 0 | — |
| China Railway Eryuan Engineering Group Co., Ltd. | 0 | — |
| THE RES FOUND OF THE STATE UNIV OF NEW YORK AT BUFFALO | 0 | — |
| TEKTON INC | 0 | — |
| Korea Conformity Laboratories | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Bridge Bearings and Seismic Isolation covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's Next
Where to take this analysis
This landscape flags the shape of the field; the next steps depend on whether the goal is freedom-to-operate, portfolio strategy, or R&D scoping.
Run a freedom-to-operate check on specific claim language
The most-cited records here, including the ball-in-cone and adaptive-stiffness isolator patents, set vocabulary that later filings often echo. Before drafting new claims, check independent claim scope on those specific records rather than relying on the aggregate trend.
Explore claims in EurekaTrack the quiet-year filers for pending disclosures
Every top assignee shows zero filings in the latest tracked year, but publication lag means some of that activity may simply not be visible yet. Set an alert on the named inventor cluster and institutional filers to catch disclosures as they publish.
Set up monitoring in EurekaScope the under-claimed sub-areas before committing R&D
Elastomer-aging monitoring and foundation-integrated isolation both sit on thinner IPC subclasses in this dataset. A short prior-art pull specific to those branches would confirm whether the gap is genuine white space or simply outside this search's keyword scope.
Search adjacent branches in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Bridge Bearings and Seismic Isolation covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions on bridge bearing and seismic isolation patents
Within the scope defined by seismic isolation bearing, bridge bearing and lead rubber bearing terms combined with damping, displacement, elastomer-aging, friction-pendulum or retrofit language, this dataset counts 26 patent families published between 2015 and mid-2026. That is a modest corpus for a structural engineering niche, meaning individual filings carry more relative weight than they would in a crowded field like battery chemistry. Broader searches without the IPC restriction to E04H9, E01D19 and F16F15 would likely surface more general elastomer or rubber-compound patents that fall outside this specific bearing-application scope.
No single corporate assignee dominates this dataset. The strongest filing relationship is a three-person inventor cluster (Liang Zach, Lee George C and Niu Tie Cheng), with university and research-institute assignees such as Tongji University, Southeast University, China Railway Eryuan Engineering Group and the University at Buffalo's research foundation also appearing. This spread suggests the field is still open to new entrants rather than locked up by an established portfolio holder.
A friction pendulum bearing isolates a structure by allowing a curved sliding surface to move under seismic load, using gravity and friction to re-center the structure afterward; a lead rubber bearing instead uses alternating layers of rubber and steel around a lead core to absorb energy through the lead's plastic deformation. Both terms appear directly in this dataset's search scope, and several records — including the representative Southeast University filing — combine friction-pendulum sliding surfaces with rubber interlayers in a single hybrid design. The choice between them in practice depends on displacement demand, vertical load capacity and maintenance access, factors that show up repeatedly in the damping-capacity and displacement-capacity claim language captured here.
The IPC composition points to structural bearing claims (E04H, E01D) heavily outweighing vibration-damper-specific claims (F16F), and foundation-integrated approaches (E02D) appear in only 2 of the 26 records. That imbalance suggests under-claimed territory in foundation-level isolation integration, elastomer-aging monitoring methods, and uplift-resistant three-dimensional isolator designs — branches touched on by only one or two records each rather than defended by multiple competing filings. Any of these would need a fresh prior-art pull before committing R&D spend, since a thin count in this specific search does not rule out coverage under different keyword framing.
Patent applications are typically published around 18 months after filing, so any record filed in the last year or two of a dataset's window simply has not had time to reach publication yet. In this dataset, 2026 shows only a single filing, but that reflects the data cut-off at mid-2026 rather than an actual drop in filing activity. The reliable way to read a trend chart is to treat the final one to two years as a floor, not a ceiling, on real filing volume.
Answers are grounded in the same dataset. Derived from a Patsnap search on Bridge Bearings and Seismic Isolation covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.