Coriolis Mass Flow Meter Patents: Top Companies & Trends 2026
- Concentrated at the top. the five leading assignees together account for 51.5% of all 4,810 records in scope, and the top ten hold 57.8%.
- Filing has cooled from its 2020 peak. 194 records that year, with the 2021-to-2024 span down 42% (96 to 56) on the last complete years of data.
- Claims cluster tightly in one subclass. G01F flow/level/volume measurement covers 69.3% of records, while adjacent process-control and materials classes each sit under 6%.
Filing growth compares 2021 (96 records) with 2024 (56) — 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 4,810 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This dataset tracks 4,810 patent records published between 2015 and mid-2026 that combine Coriolis mass flow meter or mass flow measurement language with specific technical problems: tube vibration, density measurement, two-phase flow, zero stability, pressure drop and installation stress. That combination narrows the field to records where the claims engage with the meter’s core measurement physics, rather than generic flow-metering mentions.
Because publication trails filing by roughly 18 months, the 2025 and 2026 counts in the trend below are still filling in and should not be read as a decline. The last year that can be treated as complete is 2024.
Filing trends and technology composition
Two views of the same 4,810 records: how filing volume has moved year over year, and which IPC subclasses the claims sit in.
Filing trend
Filings rose to a peak of 194 in 2020, then eased; the 2021-to-2024 window fell 42%, from 96 to 56 records. Treat 2025 and 2026 figures as undercounted rather than as evidence of a further drop.
IPC composition
G01F (flow, level and volume measurement) accounts for 69.3% of the 4,810 records, with G01N material analysis and testing a distant second at 19.9%. Because records carry multiple classes, these shares add up to more than 100% and should not be summed into a total.
Shares are the percentage of the 4,810 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Coriolis Mass Flow Meters with Eureka
This page is one run against one query. Ask Eureka your own question about coriolis mass flow meters and every answer comes back with the patent numbers behind it.
Try EurekaA representative claim
Coriolis mass flow meter and densimeter with little pressure dependence, and method for manufacturing the same
The invention relates to a Coriolis mass flow meter, comprising a housing with an inlet and an outlet for a fluid medium, arranged along a flow axis, at least one measuring tube configured to allow the fluid medium to flow through it, wherein the measuring tube includes a section with an oval cross-section giving it a longer and a shorter axis perpendicular to the flow direction, a vibration exciter configured to cause the measuring tube to vibrate, and two vibration sensors for detection of the movement.Filed by Rota Yokogawa; published 2019-09-12.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6119710A | Method for wide range gas flow system with real time flow measurement and correction | 706 |
| 2 | US6311136B1 | Digital flowmeter | 554 |
| 3 | US4823614A | Coriolis-type mass flowmeter | 384 |
| 4 | US5306350A | Methods for cleaning apparatus using compressed fluids | 368 |
| 5 | US5555190A | Method and apparatus for adaptive line enhancement in Coriolis mass flow meter measurement | 366 |
| 6 | US4934196A | Coriolis mass flow rate meter having a substantially increased noise immunity | 322 |
| 7 | US5687100A | Vibrating tube densimeter | 299 |
| 8 | US6092429A | Driver for oscillating a vibrating conduit | 296 |
| 9 | US5741980A | Flow analysis system and method | 296 |
| 10 | US6505519B2 | Correcting for two-phase flow in a digital flowmeter | 290 |
Citation counts favour older filings simply because they have had longer to accumulate citations inside this corpus; read them as a signal of influence on the field, not as a ranking of current importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Read together, the concentration, trend and class data point to a field where the core sensing geometry is heavily claimed and the growth has shifted to adjacent process integration.
The leader board is short and heavy
Five assignees hold just over half of all records in scope, and the leading company alone accounts for 1,818 of the 4,810 total. A newcomer filing core tube-geometry or drive-circuit claims is filing into territory the leader has already covered many times over.
Volume has cooled since the 2020 peak
Filing volume peaked at 194 records in 2020 and the last complete three-year window shows a 42% decline, from 96 records in 2021 to 56 in 2024. That is consistent with a maturing core design rather than a shrinking application space, given the multiplying downstream classes.
Claims sit overwhelmingly in one subclass
G01F covers more than two-thirds of the dataset, while G01N (material analysis), G05D (non-electric control) and E21B (drilling) each sit under 20% and mostly under 6%. That gap suggests the measurement-physics claims are dense, but claims tying the meter into a specific process control loop or well application are comparatively thin.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to coriolis mass flow meters, with the prior art for and against each one.
Who is filing, and where the activity has gone quiet
The ranking spans 100 companies, but recent-year momentum is concentrated in a small number of applicants, several of whom show no filings in the latest tracked year.
One applicant dominates the ranked field
The leading assignee's record count exceeds the combined total of several mid-table companies, reflecting decades of continuation filing around core tube and transmitter designs.
A steep drop after the top ten
Filing counts fall away quickly outside the leading group: tenth place sits at 42 records against a leader of 1,818, and the top ten combined still account for only 57.8% of the 4,810 records in scope, leaving a long tail of smaller filers.
Recent-year activity has gone quiet across the board
Several previously active assignees show zero filings in the latest tracked year, with year-over-year changes at or near -100% for some. Only one tracked assignee shows any filings at all in the latest year, and that count is flat year over year.
| Assignee | Recent year | YoY |
|---|---|---|
| Endress+Hauser Flowtec AG | 4 | 0% |
| Micro Motion, Inc. | 0 | -100% |
| Invensys Systems, Inc. | 0 | — |
| Emerson Electric Co. | 0 | — |
| Weatherford Technology Holdings, LLC | 0 | -100% |
| MKS Instruments, Inc. | 0 | -100% |
| Cidra Corporation | 0 | — |
| Eastman Chemical Company | 0 | — |
Where to take this analysis
The dataset points to a densely claimed core and a thinner set of adjacent applications; the next steps depend on which side of that line a given project sits on.
Map a specific claim against the leader's portfolio
With 1,818 records from a single assignee, any new tube-geometry or drive-circuit filing needs a freedom-to-operate check against that specific portfolio before drafting.
Run a claim comparison in EurekaTrack the white-space branches over time
E21B, B01J and B01F each sit under 6% of records; watching whether filing in these classes rises would signal where competitors are moving next.
Set up a monitoring search in EurekaCommon questions about this landscape
The assignee ranking in this dataset is led by a single company with 1,818 of the 4,810 records in scope, well ahead of the fifth-place holder at 121 records. The top five assignees together hold 51.5% of all records, and the top ten hold 57.8%, so the field is concentrated at the top with a long tail of smaller filers below that. Anyone assessing freedom to operate should check the leader's portfolio first, since it dwarfs every other applicant in the ranking.
Filing peaked at 194 records in 2020 and has declined since; the last complete three-year window shows a 42% drop, from 96 records in 2021 to 56 in 2024. Figures for 2025 and 2026 are still incomplete because publication typically lags filing by about 18 months, so they should not yet be read as continued decline. The honest read is that volume has cooled from its 2020 high, not that the technology area is inactive.
The search scope combines core Coriolis measurement language with specific problems: tube vibration, density measurement, two-phase flow, zero stability, pressure drop and installation stress. The IPC data shows 69.3% of records sit in G01F, the flow, level and volume measurement subclass, confirming that most claims address the core sensing mechanism rather than downstream applications. Material analysis (G01N) is a distant second at 19.9%, and every other class sits under 6%.
The class data shows thin coverage in E21B (earth and rock drilling, 5.6%), B01J (chemical/physical processes, 3.5%), B01D (separation processes, 3.3%) and B01F (mixing and stirring, 2.8%), compared with the dense 69.3% share held by core measurement claims in G01F. That gap suggests specific process-integration applications, such as well-bore metering or in-line mixing control, are comparatively under-claimed relative to the core sensor geometry. Zero-stability compensation and installation-stress isolation are two specific branches worth checking against current filings before drafting new claims there.
US20190277682A1, filed by Rota Yokogawa, claims a Coriolis mass flow meter and densimeter design built around a measuring tube with an oval cross-section, giving it a longer and shorter axis perpendicular to the flow direction, together with a vibration exciter and two vibration sensors. The stated aim is reduced pressure dependence in the density measurement. Anyone designing a tube geometry intended to reduce pressure sensitivity should compare their cross-section and sensor arrangement against this claim set specifically, rather than against Coriolis meter patents generally.
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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.