Negative Index Metamaterial Patents: Leaders & Trends 2026
A data-backed look at negative index metamaterial patents: filing trends since 2017, the concentration among leading assignees, IPC technology composition and the most-cited foundational filings.
Filing growth = 2021 (16 records) → 2024 (7); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 304 records in scope (CR5), not the ranked leaders only.
What negative index metamaterial patenting actually covers
Negative index metamaterials are artificially structured materials engineered to bend electromagnetic waves in ways natural materials cannot, by producing a negative refractive index across a targeted frequency band. The patent record in scope spans 304 records filed or published between 2015 and 2026, concentrated most heavily in antenna design and optical systems rather than in the raw materials science of the metamaterial structures themselves. That skew toward application claims — antennas, lenses, sensors — over structural or fabrication claims is the first thing a new entrant should notice, because it shapes where freedom-to-operate risk actually sits.
The receiving-office spread shows this is primarily a US-centred filing story, with the EPO, WIPO's PCT route and a handful of national offices carrying secondary volume. Read alongside the assignee concentration, the picture is one of a small group of established players holding broad application claims while a long tail of single- or few-filing entrants works around them in adjacent niches.
Filing trend and technology composition
Two views of the same 304-record dataset: how filing volume has moved year over year, and which IPC subclasses carry the claims. Because a single record can carry several IPC codes, the technology shares add up to more than 100% of records.
Filing rose through the late 2010s and has since pulled back
Filing climbed to a peak of 16 records in 2021, then fell to 7 by 2024 — a -56% move over that three-year span. The most recent one or two years in any chart like this are always understated because publication lags filing by roughly 18 months, so treat the 2025-2026 tail as provisional rather than as evidence of a further slide.
Publication lags filing by roughly 18 months, so 2025 onwards are still filling in. Growth rates on this page therefore end at 2024; running them to the last bar would understate the field.
Antennas and optics carry the claim volume
H01Q (antennas, 26.3% of records) and G02B (optical elements and systems, 24.3%) are the two largest classes by a wide margin, followed by G01N material analysis and testing at 15.1%. Waveguide/microwave hardware (H01P), medical diagnosis and surgery (A61B), semiconductor devices (H01L) and well-logging/geophysics classes (E21B, G01V) each hold single-digit-to-high-single-digit shares, marking where the technology has diffused into specific industrial applications.
Shares are the percentage of the 304 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Metamaterials: Negative Index Metamaterial Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about metamaterials: negative index metamaterial patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaThe patents the field cites most
Methods and systems for optical focusing using negative index metamaterial (US8180213B2, Raytheon Company, 2012)
The patent describes a light-focusing system for laser-guided seekers: a lens built from a negative index metamaterial focuses a selected wavelength onto a sensor while defocusing other wavelengths, effectively giving the optical system built-in spectral selectivity without a separate filter stage.Useful as a worked example of how early negative-index claims were drafted around a specific optical function (wavelength-selective focusing) rather than around the metamaterial structure in the abstract.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20040066251A1 | Planar metamaterials for control of electromagnetic wave guidance and radiation | 456 |
| 2 | US20080165079A1 | Metamaterials | 215 |
| 3 | WO2006023195A2 | metamaterials | 185 |
| 4 | US6859114B2 | Metamaterials for controlling and guiding electromagnetic radiation and applications therefor | 181 |
| 5 | US7538946B2 | Metamaterials | 158 |
| 6 | US10389410B2 | Integrated artificial magnetic launch surface for near field communication system | 115 |
| 7 | US10425793B2 | Staggered back-to-back launch topology with diagonal waveguides for field confined near field communication s… | 113 |
| 8 | US10461810B2 | Launch topology for field confined near field communication system | 112 |
| 9 | US20130025961A1 | Phononic metamaterials for vibration isolation and focusing of elastic waves | 89 |
| 10 | US20060243925A1 | Smith-Purcell radiation source using negative-index metamaterial (NIM) | 77 |
Citation counts inside a searched corpus favour older filings simply because they have had more time to accumulate citations — read them as a signal of influence on the field's vocabulary and claim structure, not as a ranking of current commercial importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Four figures from this dataset worth acting on before drafting a new application or scoping a freedom-to-operate review.
The top of the field is tight
A little over a third of all records in scope sit with just five assignees, rising to just over half with ten. That is a narrow base for a field this technically broad, and it means a new filing in a core application area is more likely to sit near an existing claim than the raw record count would suggest.
Peak filing has passed, on complete-year data
Filings peaked at 16 in 2021 and had fallen to 7 by 2024 — the last year that can be treated as complete given the roughly 18-month publication lag. That is a real pullback in new filing activity, not a data artefact, and it is worth factoring into how contested the next few years of claim space are likely to be.
Two application classes carry most of the claim volume
Antenna design and optical systems together dominate where negative-index claims land, well ahead of material-testing, medical or geophysical uses. A new entrant working in either of those two classes is filing into the densest part of the field; work in the smaller classes faces materially less crowded prior art.
Filing is US-centred with secondary EPO and PCT volume
The United States receives the largest single share of filings, with Europe (EPO) and the WIPO PCT route as the next largest routes, and Australia and India carrying meaningful but smaller volume. A clearance search limited to one jurisdiction will miss a meaningful share of the relevant prior art here.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to metamaterials: negative index metamaterial patent landscape, with the prior art for and against each one.
Where to take this analysis
The dataset points to a field with a concentrated top and a diffusing application layer. These are the questions worth running down next.
Map the antenna and optics claim boundaries
H01Q and G02B together account for the bulk of records. Before drafting in either class, pull the specific claim language from the leading assignees' filings to see exactly how narrowly or broadly the negative-index limitation is drafted.
Explore antenna & optics claimsCheck freedom-to-operate against the top 10 assignees
Half of all records in scope sit with ten assignees. A targeted FTO review against that group covers a disproportionate share of the risk relative to a review spread evenly across the ranked list.
Run an assignee-focused FTO checkWatch the smaller application classes for white space
E21B, G01V, A61B and H01L each hold single-digit shares of records. That is where claim space is least occupied, and where a well-drafted application is least likely to collide with an existing filing.
Scope the under-claimed classesQuestions practitioners ask about this field
The dataset used for this landscape contains 304 published records filed or published between 2015 and 2026, drawn from a search targeting negative index metamaterial claims and titles. This is a curated set built around a specific search string, not a count of every metamaterial-related filing in existence, so treat it as the scope for this analysis rather than a global total. Patent families, which neutralise duplicate filings across jurisdictions and continuations, are the fairer unit here and the ranking is built on that basis.
Filing is concentrated: the leading assignee alone holds 37 records, and the top 5 assignees combined account for 36.2% of all 304 records in scope, rising to 50.3% for the top 10. That leaves a long tail of entrants with only one or a few filings each. A freedom-to-operate review focused on the leading group covers a disproportionate share of the field's claim density relative to its size.
Filing peaked in 2021 at 16 records and had fallen to 7 by 2024, a decline of 56% over that span using the last year that can be treated as a complete filing year. Figures for 2025 and 2026 will look lower still, but that reflects the roughly 18-month lag between filing and publication rather than a further collapse in activity. On the complete-year evidence available, new filing activity has genuinely pulled back from its 2021 peak.
Antenna engineering (IPC class H01Q) and optical systems (G02B) are the two largest technology classes, covering 26.3% and 24.3% of the 304 records in scope respectively. Material analysis and testing (G01N) is next at 15.1%, with smaller but notable activity in microwave waveguides, medical diagnosis and surgery, semiconductor devices, and geophysical and well-drilling applications. Because a record can carry more than one IPC class, these shares overlap rather than summing to 100%.
The smaller IPC classes in this dataset — earth and rock drilling (E21B), geophysics and gravity surveying (G01V), diagnosis and surgery (A61B) and semiconductor devices (H01L) — each hold single-digit shares of the 304 records, well below the antenna and optics classes. That lower filing density suggests claim space in those application areas is comparatively open, though a lower count is a signal to investigate rather than proof of an unclaimed opportunity. Any white-space claim should still be checked against the leading assignees' broader application patents, since some of the biggest filers hold claims that reach across multiple application domains.
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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.