Precision Metrology Patents: Who Leads as Filings Cool 2026
- Filing has cooled since its 2018 peak. Activity rose to 18 families in 2018, then fell back toward the 2017 starting level, with the 2022 midpoint at just 6 — a flat-to-declining trend, not a growing field.
- Claim density concentrates in one IPC subclass. G01B (length and dimensional measurement) accounts for 252 of 282 families, dwarfing the next largest subclass, G01D, at 35 — most of the contested ground sits inside a single classification.
- No single assignee is filing in the latest year. Every tracked assignee in the momentum data shows zero families in the most recent year, consistent with the broader slowdown and with publication lag understating true recent activity.
Filing growth compares 2021 (9 records) with 2024 (11) — 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 282 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Precision metrology and calibration systems cover the instruments and methods used to measure dimension, form and position with traceable uncertainty budgets — interferometers, coordinate measuring machines, robot-cell calibration routines and the thermal-drift compensation that keeps them accurate in production environments. This search combines core terminology (precision metrology, dimensional measurement, calibration system) with claim-language markers such as repeatability, traceability, uncertainty budget, interferometer and thermal drift, restricted to the G01B, G01D and G01S measurement subclasses.
The corpus spans 282 patent families filed between 2017 and 2026, drawing filings across the United States, China, Europe, Japan, the WIPO PCT route and Germany. Because publication typically lags filing by around 18 months, the final one or two years in any trend chart will understate real filing activity until later data cuts catch up.
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Trend and technology composition
The filing curve and the IPC breakdown together show a field that expanded briefly, then settled into a narrower, well-occupied core rather than continuing to broaden.
A single peak, then a pullback
Filings climbed from 10 families in 2017 to a peak of 18 in 2018, then declined toward a midpoint of 6 in 2022. The pattern reads as a field that saw a short burst of claiming activity around dimensional-measurement and calibration methods before settling into a lower, steadier rate — with the final years still subject to publication lag.
G01B dominates the classification mix
G01B (measuring length and dimensions) covers 252 of 282 families — the clear centre of gravity. G01D (general measuring and recording) and G01S (radar, sonar and positioning) each sit in the mid-thirties, with G06T (image processing), G01N (material analysis), G01C (navigation and gyroscopes), B25J (robot manipulators) and H01L (semiconductor devices) appearing as smaller adjacent clusters — signs of metrology methods being paired with robotics, imaging and semiconductor inspection rather than standing alone.
Shares are the percentage of the 282 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Precision Metrology and Calibration Systems with Eureka
This page is one run against one query. Ask Eureka your own question about precision metrology and calibration systems and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art in this space
Self-calibration system and method for interferometer angle and surface curvature verification
US5600439A describes a self-calibration system that determines the adequacy of an interferometer angle and surface curvatures inside an inspection system used to contactlessly measure the disparity between two surfaces, such as the undercut or protrusion of an optical fibre relative to its surrounding support material. The system measures a fringe offset over a target in the captured image to determine the disparity, using a measurement apparatus with an interferometer positioned at a defined angle.Filed by Furukawa Electric North America, published 1997-02-04.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5561526A | Three-dimensional measurement device and system | 229 |
| 2 | US20110288818A1 | Method and Apparatus for Dimensional Measurement | 177 |
| 3 | US20090157226A1 | Robot-cell calibration | 129 |
| 4 | DE4108944A1 | Contactless measurement of surface shape of diffusely scattering objects e.g. semiconductor wafers – using in… | 121 |
| 5 | DE19536297A1 | Geometric calibration of optical 3-D sensors for three=dimensional measurement of objects | 100 |
| 6 | US5832416A | Calibration system for coordinate measuring machine | 99 |
| 7 | US5303034A | Robotics targeting system | 94 |
| 8 | US6460004B2 | Method and apparatus for calibrating a non-contact gauging sensor with respect to an external coordinate syst… | 76 |
| 9 | US5298978A | Pipette calibration system | 75 |
| 10 | US20150015895A1 | Three-dimensional measurement device having three-dimensional overview camera | 66 |
Citation counts are drawn from the searched corpus and favour older filings that have had more time to accumulate references; treat them as a signal of influence on the field, not of current commercial relevance.
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Browse MCP servers →What the numbers mean for a filing decision
Three patterns stand out once family counts, classification spread and citation concentration are read together.
Growth has already happened
The 2018 peak of 18 families followed by a decline to 6 by 2022 indicates the field's most active claiming period is behind it, not ahead. New entrants should treat this as a maturing space where the obvious claim territory is already staked, rather than an emerging one.
One subclass carries almost the whole field
G01B's 89% share of the corpus means dimensional-measurement claim language is dense and well-trodden. The smaller clusters in G01D, G01S, G06T and B25J look more like where genuinely new claim scope still exists, since they represent metrology combined with adjacent disciplines rather than the core method itself.
Influence sits with older foundational filings
The most-cited records — spanning three-dimensional measurement devices, robot-cell calibration and interferometric surface-shape measurement — were published well before the 2018 filing peak. Their citation counts reflect years of accumulated reference, so newer filings should be judged on claim scope and freedom-to-operate rather than on citation count alone.
Filing is split across three major offices
The United States (81), China (62) and the EPO (53) each carry a substantial share of filings, with Japan, the WIPO PCT route and Germany trailing behind. A freedom-to-operate check confined to a single jurisdiction would miss a meaningful portion of the active claim set.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to precision metrology and calibration systems, with the prior art for and against each one.
Who holds the claim space
No assignee in the tracked momentum data recorded a filing in the most recent year — consistent with the broader slowdown and with the usual publication lag rather than a sudden industry-wide exit.
Established metrology vendors hold the historic core
Assignees such as FARO Technologies, Nikon Metrology, Sensor-maker Keyence-adjacent firms and Corning appear across the historic filing record, concentrated in the dense G01B interferometer and dimensional-measurement claim territory. None shows activity in the latest tracked year, which given publication lag is not yet evidence of withdrawal.
Collaboration is limited and mostly institutional
Only ten co-assignee pairs appear across the corpus, the strongest being a Shanghai metrology-institute and information-technology company pairing filed twice. Most other pairs, including a university-and-instrument-maker link in Japan and a named-inventor pairing at FARO, appear only once — this is a field of largely independent filers rather than joint-venture activity.
A moderate-sized, specialist field
At 282 families across a decade, this is a specialist niche rather than a mass-filing category — closer in scale to fields where a handful of established instrument makers and a long tail of single-filing entrants coexist than to a crowded consumer-technology space.
| Assignee | Recent year | YoY |
|---|---|---|
| Kikai Riki Co., Ltd. | 0 | — |
| BROWN & SHARPE MANUFACTURING CO | 0 | — |
| FARO Technologies, Inc. | 0 | — |
| Sensor Corporation | 0 | — |
| Corning Incorporated | 0 | — |
| Nikon Metrology NV | 0 | — |
| Input/Output, Inc. | 0 | — |
| Stotz Precision Measurement Technology Co. | 0 | — |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, white-space filing, or competitive tracking.
Run a freedom-to-operate check on G01B claims
With 252 of 282 families sitting inside a single IPC subclass, any new interferometer or dimensional-measurement filing needs a clearance search focused specifically on that dense core rather than the field as a whole.
Explore prior art in EurekaTest claim language against the under-claimed branches
Robot-cell self-calibration, thermal-drift compensation and vision-guided metrology show meaningfully fewer families than the G01B core — draft and stress-test candidate claims there before committing to a full filing.
Draft claims in EurekaTrack assignee re-entry as new data cuts arrive
Zero recent-year filings across tracked assignees is consistent with publication lag, not necessarily exit. Re-run the momentum view against later data cuts before concluding any competitor has left the space.
Monitor assignees in EurekaCommon questions about this landscape
In this landscape, it means a filing whose title or abstract references precision metrology, dimensional measurement or calibration systems, combined with claim language around repeatability, traceability, uncertainty budgets, interferometers or thermal drift, and classified under G01B, G01D or G01S. That combination captures interferometric measurement devices, coordinate measuring machine methods, and robot-cell or instrument self-calibration routines. It excludes general sensor patents that do not address measurement uncertainty or calibration directly.
The data shows a rise from 10 families in 2017 to 18 in 2018, then a drop toward 6 by the 2022 midpoint. This pattern typically indicates that the core claim territory — in this case, dimensional-measurement and interferometer methods under G01B — was substantially staked out early, leaving less obvious room for new independent filings afterward. It does not necessarily mean the underlying technology stopped advancing, only that patent activity around it slowed. Readers should also account for publication lag, which understates filings in the last one to two years of any dataset.
The corpus includes established instrument manufacturers such as FARO Technologies, Nikon Metrology and Corning, alongside a long tail of single-filing entrants and academic institutions. None of the tracked assignees shows filings in the most recent year, which is consistent with normal publication lag rather than a sign that any of them have exited the field. A full assignee ranking table, updated from the 282 tracked families, shows the relative filing volumes in more detail.
The smaller IPC clusters adjacent to the dominant G01B subclass are the most promising areas to examine: G01D general measurement, G01S positioning, G06T image processing paired with metrology, and B25J robot manipulators combined with self-calibration routines all carry far fewer families than the core dimensional-measurement classification. These combinations — such as vision-guided coordinate metrology or robot-cell self-calibration — represent claim territory that is far less densely occupied than the core interferometer and dimensional-measurement space.
Citation counts in this dataset are a useful but skewed signal: the highest-cited records, such as the 229-citation three-dimensional measurement device patent, were published years before the field's 2018 filing peak, simply because older patents have had more time to accumulate citations. A recent filing with few citations is not necessarily less important — it may just be too new to have been cited widely yet. Citation counts are best read as a measure of historical influence within the searched corpus, not as a ranking of present-day commercial relevance.
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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.