Micro-Speaker Patents: Who Leads, Where the Gaps Are 2026
- Concentrated but not locked down. the top 5 assignees hold 41.3% of all 104 records in scope, while a long tail of single- and few-filing entrants covers the rest.
- Filing activity has plateaued. annual filings peaked at 9 in 2023 after climbing from 6 in 2017, with no sign of renewed acceleration through the most recent full year.
- Claim density sits almost entirely in one class. H04R (loudspeakers & transducers) covers 95.2% of records, meaning the real differentiation happens in the smaller adjacent classes, not the headline one.
What this patent landscape covers
Micro-speakers and acoustic modules sit at the intersection of transducer design, mobile-device packaging, and acoustic sealing. This landscape covers 104 published records filed between 2015 and 2026 that describe diaphragm materials, excursion control, waterproof mesh structures, and defect screening for rub-and-buzz artifacts. The scope is narrow by design: it excludes general loudspeaker architecture and focuses on the claim language specific to compact, sealed acoustic assemblies built for handsets, wearables, and similar form factors.
Because publication typically lags filing by around 18 months, the most recent year in the trend below is understated and should not be read as a drop-off in activity. The dataset is best read at the family level rather than the raw document level, since continuation and multi-jurisdiction filing can inflate document counts without adding new technical scope.
Filing trend and technology composition
Two views of the same 104 records: how filing activity has moved year over year, and which IPC subclasses the claims actually sit in.
A decade of flat-to-declining filing
Annual filings rose from 6 in 2017 to a peak of 9 in 2023, with the 2022 midpoint at 7. That trajectory reads as flat or mildly declining rather than a growth curve, though the final year or two is always undercounted due to publication lag.
One dominant class, several thin adjacent ones
H04R (loudspeakers & audio transducers) appears in 95.2% of the 104 records, confirming this is the core classification for the field. Adjacent classes such as G10K, H01R, and B06B each sit under 8% of records, and B81B, H03F, and H03G are all below 4% — these thinner classes are where sealing, MEMS integration, and amplification-side claims are lodged, and they carry far less filing density than the headline class.
Shares are the percentage of the 104 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Micro-Speakers and Acoustic Modules with Eureka
This page is one run against one query. Ask Eureka your own question about micro-speakers and acoustic modules and every answer comes back with the patent numbers behind it.
Try EurekaA representative claim: Apple's sealed acoustic chamber
Micro speaker having a hermetically sealed acoustic chamber with increased volume
A micro speaker assembly including a speaker enclosure having an enclosure wall separating a surrounding environment from an encased space, wherein the enclosure wall defines, in part, an acoustic channel that acoustically couples the encased space to the surrounding environment, and the enclosure wall comprises a chemically etched insert molded metal portion that is mechanically interlocked and hermetically sealed to a plastic portion. The micro speaker further including a speaker assembly positioned within the encased space, the speaker assembly having a sound radiating surface facing the metal portion of the enclosure wall, a voice coil extending from the sound radiating surface, a magnetFiled by Apple Inc., published 2019-02-28.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20160094917A1 | Capacitive position sensing for transducers | 217 |
| 2 | US20060098838A1 | Dynamic micro speaker with dual suspension | 56 |
| 3 | US20110038495A1 | Piezoelectric micro speaker and method of manufacturing the same | 47 |
| 4 | US6553126B2 | Micro speaker | 36 |
| 5 | US9967664B1 | Sensor assembly for measuring diaphragm displacement and temperature in a micro speaker | 32 |
| 6 | US20080091416A1 | Method, medium and apparatus enhancing a bass signal using an auditory property | 29 |
| 7 | US7505603B2 | Dynamic micro speaker with dual suspension | 29 |
| 8 | US20110255715A1 | Multifunctional micro-speaker | 27 |
| 9 | US20190069076A1 | Micro speaker having a hermetically sealed acoustic chamber with increased volume | 22 |
| 10 | US20190297426A1 | Micro planar speaker | 15 |
Citation counts favour older filings within the searched corpus and should be read as a signal of influence, not 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 filing strategy
Four read-throughs from the filing trend, the concentration figures, and the IPC composition.
The top of the field is dense, the rest is open
Five assignees account for 41.3% of all 104 records in scope, and the top 10 combined reach 66.3%. That leaves roughly a third of the field held by a long tail of companies filing only once or twice, which is the profile of a technology with a settled core design and room around the edges.
Growth has stalled since the 2022-2023 peak
Filings climbed from 6 in 2017 to a peak of 9 in 2023, with the 2022 midpoint at 7. That is a flat-to-declining pattern rather than an accelerating one, and several of the most active historical filers show zero filings in the latest tracked year.
Nearly all claims route through one subclass
H04R covers 95.2% of the 104 records, which means the subclass itself tells you little about differentiation. The signal is in the smaller overlapping classes — G10K, H01R, B06B, and the sub-4% classes B81B, H03F and H03G — where sealing, MEMS, and amplification claims are actually being staked out.
Filing is US- and PCT-anchored with a Korea/China tier below
The United States leads with 40 filings, followed by WIPO PCT filings at 16 and China at 14. South Korea, Europe, and Taiwan form a second tier, which suggests global protection strategies are being built around US and PCT priority rather than a single regional anchor.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to micro-speakers and acoustic modules, with the prior art for and against each one.
Who holds the claim space, and where it thins out
The ranked assignee list spans 43 companies. A handful hold multiple filings across related entities, while most of the field files once or twice and stops.
One filer sits well ahead of the rest
The leading assignee holds 12 records against a fifth-place figure of 7 and a tenth-place figure of 4 — a steep drop-off that marks this as a leader-and-field structure rather than a tight cluster at the top.
Related-entity filing is common among the top group
Several of the strongest co-assignee pairs involve the same parent group filing through multiple regional subsidiaries, each pairing appearing 4 times. That pattern is typical of manufacturers protecting the same core design across jurisdictions through affiliated entities rather than independent invention.
Historical filers have gone quiet recently
Multiple assignees that appear prominently in the historical ranking, including several of the most active filers, show zero filings in the latest tracked year. Read alongside the 2023 peak, this points to a field where the core design space has been substantially staked out already.
| Assignee | Recent year | YoY |
|---|---|---|
| BSE Co., Ltd. | 0 | — |
| MYVOX AB | 0 | — |
| JIN YOUNG ACOUSTIC CO LTD | 0 | — |
| Fortemedia Inc. | 0 | — |
| Apple Inc. | 0 | — |
| Solos Technology Ltd. | 0 | — |
| Samsung Electro-Mechanics Co., Ltd. | 0 | — |
| Samsung Electronics Co., Ltd. | 0 | — |
Where to take this analysis
The trend and ranking data point to specific next questions for R&D and IP teams working in this space.
Check freedom-to-operate against the top 10
With 66.3% of records held by 10 assignees, a freedom-to-operate review should start with the ranked leaders' claim scope in H04R before looking at the long tail.
Explore assignee claim scope in EurekaMap the thin adjacent classes before filing
Classes like B81B, H03F and H03G sit under 4% of records each, which is where new claim territory is most likely to still be open.
Run a white-space search in EurekaTrack quiet filers for renewed activity
Several previously active assignees show zero filings in the latest year; a watch list can flag if and when they resume.
Set up assignee monitoring in EurekaCommon questions about micro-speaker patents
The ranked list in this dataset covers 43 assignees, with the top filer holding 12 records and a clear drop-off to 7 records at fifth place and 4 at tenth. That structure indicates one company has built a materially larger portfolio than any single competitor, while the remaining ranked assignees form a broad, thinner field. Several of the historically active filers, including some of the largest, show no filings in the most recent tracked year, so leadership by cumulative count does not necessarily mean current momentum.
Filing activity in this dataset rose from 6 records in 2017 to a peak of 9 in 2023, with the 2022 midpoint at 7 — a flat-to-declining trajectory rather than sustained growth. Because publication lags filing by roughly 18 months, the final year or two in any such trend is always undercounted, so a firm read on the very latest activity requires waiting for more filings to publish. Based on the pattern through the peak, this looks like a maturing filing curve rather than an emerging one.
The bulk of filing activity, 95.2% of the 104 records in scope, sits in the H04R loudspeaker and transducer classification, which is expected for this field. Classes like B81B (MEMS structures), H03F (amplifiers) and H03G (gain control) each cover under 4% of records, and G02C (spectacles/lenses, relevant to wearable acoustic modules) sits at 4.8% — these thinner classes are where new claim territory is more likely to still be open. A team evaluating where to file should treat low class density as a signal to search carefully rather than a guarantee of open space.
US20190069076A1, assigned to Apple, claims a micro-speaker enclosure with a chemically etched, insert-molded metal portion mechanically interlocked and hermetically sealed to a plastic portion, forming an acoustic channel between an encased space and the surrounding environment. Anyone designing a sealed acoustic chamber that relies on a similar metal-to-plastic interlock for hermetic sealing should review this claim language closely before finalizing an enclosure design. It does not block acoustic module designs that seal through other means, such as adhesive bonding, overmolding without chemical etching, or single-material enclosures, so alternative sealing methods remain a viable design-around path.
The United States leads with 40 filings, ahead of WIPO PCT filings at 16 and China at 14, with South Korea, Europe and Taiwan forming a smaller secondary tier. This distribution suggests companies in this field are prioritising US protection and building out international coverage through PCT applications rather than filing directly and separately in each major market. Teams benchmarking regional strategy should note that PCT filings will eventually enter national phase in additional jurisdictions not yet reflected in the direct country counts.
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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.