Optical Intersatellite Links Patents: Who Leads, Trends 2026
- 93.8% of all 16 records sit with the top five assignees, leaving almost no room for a sixth entrant to build volume in this exact claim space.
- Filing peaked in 2021 at 7 and fell to zero recorded filings by 2024 — a complete reversal that predates the 18-month publication lag affecting 2025-26.
- H04B transmission claims cover 93.8% of records while G02B optical-element claims sit at just 37.5%, showing most protection is written at the link/system level, not the optics.
Filing growth compares 2021 (7 records) with 2024 (0) — 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 16 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Optical intersatellite links depend on a chain of subsystems that must work together: a coarse pointing assembly to acquire a distant terminal, a fine pointing assembly and fine steering mirror to hold the beam once locked, a beam acquisition sequence to close the loop under relative platform motion, and doppler frequency compensation plus coherent homodyne detection to keep the link closed as satellites move apart at orbital speed. This dataset isolates records that combine at least one pointing or acquisition mechanism with at least one signal-processing or detection element — a narrow, functionally defined slice rather than a broad optical-communications category.
Sixteen published records meet that definition across the 2015-2026 window, with filings concentrated in a small number of receiving offices and a short peak period rather than spread evenly across the years.
Filing trend and technology composition
Two views of the same 16 records: when the filings happened, and which IPC subclasses they were written under. Both point to a narrow, already-occupied claim space rather than a fast-growing one.
A short, sharp filing peak
Filings were absent in 2017, built to a peak of 7 in 2021, and had fallen to 0 by 2024 — a -100% swing over that three-year span. Treat 2025 and 2026 as still filling in given the roughly 18-month gap between filing and publication; they should not be read as confirming a continued decline.
Claims cluster in transmission, not optics
H04B (transmission, general) appears in 93.8% of the 16 records, far ahead of G02B (optical elements and systems) at 37.5%. B64G (spacecraft), H01S (lasers) and H04J (multiplex communication) each appear in only one record (6.3%), suggesting most drafting effort has gone into the link-level signal and pointing-control claims rather than the underlying optical hardware or spacecraft integration.
Shares are the percentage of the 16 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Optical Intersatellite Links with Eureka
This page is one run against one query. Ask Eureka your own question about optical intersatellite links and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative filing and most-cited records
Optical coarse pointing assembly (WO2023060450A1)
An optical coarse pointing assembly, CPA, of an optical communication terminal, OCT, adapted to establish and/or maintain an optical communication link between the terminal and an external optical flight platform, using a CPA mirror to reflect an optical beam received from the external platform into a telescope of an optical head unit, and/or to reflect an outgoing beam from the telescope toward the external platform.Filed by Shanghai Yu Hang Guang Ji Technology Company Limited, published 2023-04-20.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20210242939A1 | Coarse pointing arrangement | 3 |
| 2 | EP4258571A1 | Tunable and polarization insensitive optical communication system | 2 |
| 3 | US20230327772A1 | Tunable and polarization insensitive optical communication system | 1 |
| 4 | EP3859426A1 | Coarse pointing arrangement | 1 |
Citation counts favour older filings simply by virtue of being in the corpus longer; treat them as a signal of influence within this dataset, not as a ranking of current importance.
Publication numbers are shown where the record carries one (4 of 4 rows); clicking a row searches Eureka by that number.
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The dataset is small and concentrated, which changes how a landscape like this should be read: absolute counts matter less than where the claim density sits and when it stopped growing.
Five assignees hold nearly the whole field
Only 16 published records meet this search definition, and five assignees account for 15 of them. A sixth assignee closes the set entirely at 100%. That leaves essentially no unclaimed volume among filers already active here — a new entrant is more likely to find room by working an adjacent subsystem than by filing directly against the leaders.
The peak has already passed
Filing activity peaked at 7 records in 2021 and had dropped to 0 by 2024, a complete reversal captured in the -100% figure for that span. Because publication lags filing by around 18 months, 2025-26 filings are still arriving; the honest reading is that the last confirmed complete year shows no filings, not that the technology has stopped moving.
Protection sits at the link level
Nearly every record touches H04B transmission claims, but only just over a third also carry G02B optical-element claims, and B64G spacecraft-integration claims appear in a single record. That gap is where drafting effort has not gone — optical hardware and spacecraft-level integration are comparatively open relative to the signal and pointing-control layer.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to optical intersatellite links, with the prior art for and against each one.
Who is filing, and where the gaps sit
The ranked leaders in this dataset are six companies drawn from spacecraft communications, optical systems and aerospace research backgrounds. None shows fresh filings in the latest year captured, which is consistent with the 2021 peak rather than a sign any one of them has withdrawn from the space.
One assignee sets the pace
The leading assignee in this ranking holds 5 of the 16 records in scope, the largest single share in a field where the next four assignees combine to reach the 93.8% concentration figure. That degree of clustering at the top, alongside a long tail of single-filing entrants once the sixth assignee is reached, is typical of a functionally narrow, still-small patent family.
A thin middle tier, not a broad one
Fifth place in the ranking holds 2 records, meaning the gap between the top assignee and the rest of the ranked field is wide rather than gradual. Anyone benchmarking freedom to operate here should treat the leader's claims as the primary reference point, not assume the field is evenly contested.
No assignee is currently active by this measure
Every assignee tracked for recent-year momentum, including the leader, shows 0 filings in the latest year captured. Given the 18-month publication lag, this reflects the same 2021 peak-to-2024 decline seen in the trend data rather than necessarily meaning all activity has stopped.
| Assignee | Recent year | YoY |
|---|---|---|
| COM DEV LTD | 0 | — |
| German Aerospace Center (DLR) | 0 | — |
| BEIJING SINAERO INFORMATION & COMM TECH LTD | 0 | — |
| HONEYWELL LTD HONEYWLL LIMITÈE | 0 | — |
| HONEYWELL LIMITED HONEYWELL LIMITÉE | 0 | — |
Where to take this analysis
The dataset points to a narrow, front-loaded field. The next steps depend on whether the goal is defensive clearance or identifying open claim space.
Map claims against the leader's family
With one assignee holding 5 of 16 records, freedom-to-operate work should start by reading that assignee's claim scope in detail before assuming any pointing-assembly approach is open.
Explore assignee claims in EurekaTest the under-claimed branches
Optical-element hardware and spacecraft-level integration carry lower claim density than the transmission layer — worth a focused search before committing drafting resources there.
Run a white-space search in EurekaWatch for the 2025-26 lag to resolve
The apparent drop to zero filings by 2024 may soften once 2025-26 publications catch up; recheck the trend in a future pull rather than treating today's snapshot as final.
Track filing trends in EurekaFrequently asked questions
This dataset identifies 16 published records that combine a pointing or acquisition mechanism — such as a coarse or fine pointing assembly — with a signal-processing or detection element like doppler compensation or coherent homodyne detection. That is a narrow, functionally defined slice of the broader optical-satellite-communications field, not a count of every patent mentioning intersatellite optics. The true figure for adjacent or more loosely related filings would be larger.
Six assignees make up the entire ranked field in this dataset, with the top five together accounting for 93.8% of all 16 records in scope. The leading assignee alone holds 5 records, well ahead of the fifth-ranked assignee's 2. That concentration means due-diligence work should focus on the top few names rather than searching broadly across many small filers.
Filing peaked at 7 records in 2021 and had fallen to 0 by 2024, a -100% change over that span using the most recent year that can be treated as complete. Because patent publication typically lags filing by about 18 months, 2025 and 2026 figures are still incomplete and should not yet be read as confirming a continued decline. The honest summary is that visible activity was front-loaded around 2021 and has not been matched since in complete-year data.
WO2023060450A1 claims an optical coarse pointing assembly for an optical communication terminal, built around a CPA mirror that reflects an incoming beam from an external optical flight platform into a telescope, and can also reflect the outgoing beam back toward that platform. It was filed by Shanghai Yu Hang Guang Ji Technology Company Limited and published 2023-04-20. Anyone designing a coarse-acquisition stage that relies on a single steering mirror serving both receive and transmit paths should read this claim set closely before finalizing an architecture.
IPC composition shows 93.8% of the 16 records carry H04B transmission claims but only 37.5% also carry G02B optical-element claims, and spacecraft-integration claims under B64G appear in just one record. That gap suggests link-level signal and pointing-control claims are heavily occupied while the underlying optical hardware and spacecraft-level integration carry comparatively little filed protection — a more promising area to search before drafting new claims.
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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.