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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/quantum-sensing-and-metrology-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Quantum TechnologyQuantum Sensing and Metrology Patents: Filing Trends and Open Claim Space
- Filing has plateaued, not grown. Filings peaked in 2021 at 42 and sat at 41 by the 2022 midpoint, with no clear upward trend since — this is a maturing claim space, not an emerging one.
- G04F dominates the IPC mix. Time-interval measurement (G04F) appears in 257 of 328 records, far ahead of frequency control (H03L, 91) and magnetic/electric measurement (G01R, 82) — most claim activity still centers on timing, not field sensing.
- Momentum has stalled even among named leaders. Most tracked assignees, including Honeywell and Northrop Grumman, show zero filings in the latest year; only one tracked entity logged a single filing, suggesting the visible leaderboard is running on prior-year momentum.
328
Published Records
34%
Top-5 Share of All Records
-45%
3-Yr Growth (lag-adjusted)
US
Leading Jurisdiction
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Overview
What the filing record shows
Quantum sensing and metrology patenting sits at the intersection of atomic physics and precision electronics: atomic clocks, NV-center magnetometers and cold-atom systems claimed under IPC classes spanning time measurement, frequency control and magnetic sensing. The 328 families tracked here span 2015 through the 2026 cut-off, with publication lagging filing by roughly 18 months — so the most recent year's count understates real activity. The technology mix is lopsided toward timing and frequency stabilization rather than field-sensing applications, which points to where the claim space is thick and where it is thin.
Filing offices split across the United States, Europe, China, the WIPO PCT route, Japan and India, indicating a field still being filed multi-jurisdictionally rather than consolidated into one home market. Co-assignee activity is sparse — only eight pairs recorded — with a single Japanese research cluster accounting for the strongest links, which signals limited cross-institution collaboration relative to the size of the corpus.
Filings by year, 2017–2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Quantum Sensing and Metrology 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
Data
Filing trend and technology composition
The two views below are the backbone of the landscape: how filing volume has moved year over year, and how that volume splits across IPC subclasses.
A plateau after a 2021 peak
Filings rose from 19 in 2017 to a peak of 42 in 2021, then held near that level at 41 in 2022 before the tail years show a decline — consistent with a field that expanded through the late 2010s and has since settled rather than continuing to accelerate. The 2026 figure of 4 is a partial year and should not be read as a collapse.
Timing and frequency control dominate
G04F (time-interval measuring) appears in 257 of 328 records, more than double the next subclass, H03L (automatic frequency/phase control) at 91. G01R (electric and magnetic measurement, 82) and H01S (lasers, 61) trail behind, while G01N (material analysis, 36), H03B (oscillation generation, 18), G01C (navigation/gyroscopes, 14) and G06N (AI-based computing, 13) each cover a much smaller share — the last two suggest sensing-adjacent applications like inertial navigation and AI-assisted calibration are still lightly claimed.
Shares are the percentage of the 328 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 Quantum Sensing and Metrology covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
Go deeper on Quantum Sensing and Metrology with Eureka
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The most-cited prior art in this space
Representative recent filing
Cold atom generation apparatus, cold atom generation method, physical package (EP4550593A1, RIKEN, 2025)
RIKEN
The filing describes a two-region cold-atom apparatus: atoms are first trapped magnetically in one state in a first region, optically pumped and moved by gravity or radiation pressure into a second region, then cooled and pumped again into a magnetically insensitive third state before being released and transported onward for further processing.The staged trap-cool-release sequence, and the specific use of a magnetically insensitive third state as the transport condition, are the parts of this claim most likely to constrain adjacent cold-atom physical-package designs.
Highest-citation records in the corpus
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5657340A | Rubidium atomic clock with fluorescence optical pumping and method using same | 78 |
| 2 | US20200116623A1 | Controlling alkaline earth atoms for quantum computing and metrology applications | 76 |
| 3 | US20190235031A1 | On-Chip Detection of Spin States in Color Centers for Metrology and Information Processing | 62 |
| 4 | US20140104008A1 | Device, system, and method of frequency generation using an atomic resonator | 62 |
| 5 | US8525516B2 | Apparatus with ambient magnetic field correction | 60 |
| 6 | US20150378316A1 | Microfabricated atomic clocks (MFAC) & magnetometers (MFAM): high sensitivity vapor cell structure with inter… | 56 |
| 7 | US20040202050A1 | Method and system for operating an atomic clock with simultaneous locking of field and frequency | 51 |
| 8 | US20180156875A1 | Package for chip scale magnetometer or atomic clock | 49 |
| 9 | US6888780B2 | Method and system for operating an atomic clock with simultaneous locking of field and frequency | 46 |
| 10 | US20170281102A1 | Non-contact angle measuring apparatus, mission critical inspection apparatus, non-invasive diagnosis/treatmen… | 45 |
Citation counts favor older filings simply because they have had more time to accumulate citations within this searched corpus — read them as markers of influence on later claim drafting, not as evidence of current commercial relevance.
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 Quantum Sensing and Metrology 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 mean for a filing decision
Three patterns in this corpus matter more than any single ranking: where claim density sits, where offices concentrate, and how thin cross-institution collaboration is.
Claim density
257 of 328
records touch G04F
Timing claims are the densest prior art
Time-interval measurement under G04F covers more than three-quarters of the corpus. Any new atomic-clock or frequency-reference filing is entering the most contested part of this landscape, not an open one.
IPC subclass composition
Office spread
US 108 · EPO 71 · CN 70
top three receiving offices
No single jurisdiction dominates
The United States leads but not overwhelmingly; Europe and China sit close behind, with a further 28 filings routed through the WIPO PCT system. Freedom-to-operate work here has to clear at least three major offices, not one.
Receiving office counts
Collaboration
8 pairs
co-assignee relationships found
Cross-institution filing is rare
Only eight co-assignee pairs appear across 328 families, and the strongest of them links a single Japanese research cluster. Most filings in this space are single-assignee, which is unusual for a field this instrumentation-heavy.
Co-assignee pair analysis
Momentum
0 in latest year
for most tracked leaders
Leaderboard momentum has cooled
Several assignees with strong historical filing counts, including large defense and instrumentation firms, show no filings in the most recent tracked year. Only one tracked assignee logged a single filing in that period, which is a caution against reading the historical ranking as a current activity signal.
Recent-year filings by assignee
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Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to quantum sensing and metrology, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Quantum Sensing and Metrology 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 holds the claim space
The named assignees below sit at very different points on the activity curve — some built their position years ago and have gone quiet, one shows a single recent filing.
Research cluster
24 shared filings
strongest co-assignee pair
A Japanese instrumentation-research pairing leads collaboration
The strongest co-assignee link in the corpus pairs a Japanese electronics-instrument maker with a national research institute, appearing together on 24 filings — far ahead of any other pairing found.
Co-assignee pair strength
Recent activity
1 filing
in the latest tracked year
Only one tracked assignee shows current-year movement
Among the named assignees tracked for recent momentum, a Chinese university is the sole one with a filing in the latest year; the rest, including large industrial and defense names, register zero.
Recent-year momentum
Historical scale
78 citations
on the top-cited record
The most-cited prior art predates the current wave
The highest-citation record in the corpus is a rubidium atomic clock filing built on fluorescence optical pumping — a design lineage that still anchors citation chains in newer frequency-reference filings.
Most-cited records table
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| University of Science and Technology of China | 1 | — |
| Honeywell International Inc. | 0 | — |
| JEOL Ltd. | 0 | — |
| RIKEN | 0 | — |
| Commissariat à l'énergie atomique et aux énergies alternatives (CEA) | 0 | — |
| Northrop Grumman Systems Corporation | 0 | — |
| Beijing Institute of Radio Metrology and Measurement | 0 | -100% |
| RIKEN | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Quantum Sensing and Metrology 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
The trend and ranking data on this page are a starting point for deeper freedom-to-operate and whitespace work.
Map claims against your own roadmap
Cross-reference the IPC composition here against your own component list — timing, frequency control or field sensing — to see which of your planned claims land in the densest prior art.
Explore in Eureka →Track the quiet leaders
Several historically strong assignees show no recent filings. Watch for renewed activity or acquisition signals before assuming the field has settled.
Set up monitoring in Eureka →Investigate the under-claimed branches
Chip-scale packaging and AI-assisted calibration carry the lightest IPC representation in this corpus, which may reflect genuine openness or just early-stage application.
Run a whitespace search in Eureka →Source: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Quantum Sensing and Metrology 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 quantum sensing and metrology patents
The corpus shows a mix of Japanese research-instrument makers, large defense and industrial firms, and Chinese universities among the named assignees, but no single entity dominates the recent filing years. The strongest documented relationship is a co-assignee pairing between a Japanese instrumentation company and a national research institute, appearing together on 24 filings. Most other assignees with historically strong counts, including large defense contractors, show zero filings in the latest tracked year, so a ranking built purely on cumulative counts can overstate who is currently active.
Not clearly. Filings rose from 19 in 2017 to a peak of 42 in 2021, then held roughly flat at 41 by 2022, and the tail years show declining counts. Because publication typically lags filing by around 18 months, the most recent one or two years understate true activity, but the mid-corpus flattening is a real signal that this field has moved from expansion into a maturing phase rather than continuing to accelerate.
Time-interval measurement, classified under IPC subclass G04F, appears in 257 of the 328 tracked records — by far the largest share. Frequency and phase control (H03L, 91 records) and electric/magnetic measurement (G01R, 82 records) follow well behind. This means atomic-clock and frequency-reference claims are the most contested part of the landscape, while applications like navigation-grade gyroscopes (G01C, 14 records) and AI-assisted sensing (G06N, 13 records) remain comparatively open.
The smaller IPC subclasses in this corpus — G01C (navigation and gyroscopes), G06N (AI-based computing) and H03B (oscillation generation) — carry the lowest record counts, suggesting lighter claim density around inertial navigation applications of quantum sensors, AI-assisted calibration routines, and chip-scale oscillator packaging. These are not guaranteed white space, since low counts can also mean low commercial interest, but they warrant a targeted prior-art search before committing claim language.
The United States leads with 108 records, followed by the European Patent Office at 71 and China at 70, with a further 28 filings routed through the WIPO PCT system and smaller counts in Japan and India. The gap between the top three offices is not large, which means a freedom-to-operate review limited to a single jurisdiction will miss a meaningful share of the relevant prior art in this field.
Answers are grounded in the same dataset. Derived from a Patsnap search on Quantum Sensing and Metrology 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.