Differential Pressure Flow Measurement Patents: Leaders & Trends 2026
Differential Pressure Flow Measurement Patents: Who Leads and Where the Field Is Moving
Concentrated at the top. The five most active assignees combined hold 30.6% of all 1,906 records in scope, with the leader alone accounting for 243 families. Filings rose from 60 in 2017 to a peak of 99 in 2021, then fell 68% to 32 by 2024 — the last year the dataset can treat as complete, since publication typically lags filing by around 18 months and 2025-2026 counts will still fill in.
- 1ROSEMOUNT INC12.7%
- 2DEKA PRODUCTS LP8.1%
- 3DIETERICH STANDARD INC3.5%
- 4SCHLUMBERGER HLDG LTD3.3%
- 5MKS INSTR INC3.0%
See the full differential pressure flow measurement analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions about this landscape
Who holds the most patents in differential pressure flow measurement?
One assignee leads with 243 records in this dataset, well ahead of the fifth-ranked assignee at 57 and the tenth at 31. That gap indicates a steep drop-off after the top filer rather than a tightly bunched group of equally sized competitors. Beyond the leading names, the remaining share of the 1,906 records in scope is spread across a long tail of companies with far fewer filings each, so a freedom-to-operate check should not assume the field is fully covered by a handful of large portfolios.
Is differential pressure flow measurement patent activity growing or slowing?
Filing volume rose from 60 in 2017 to a peak of 99 in 2021, then fell 68% to 32 by 2024. Because patent publication typically lags the underlying filing date by around 18 months, 2025 and 2026 figures in any raw trend chart are still incomplete and should not be read as evidence of continued decline. Based on the complete years available, the honest read is a pullback from a 2021 peak rather than a technology in growth mode.
What patent classes cover differential pressure flow measurement?
The core class is G01F (flow, level and volume measuring), covering 57.9% of the 1,906 records in scope. A meaningful share also falls in A61M (body-fluid devices, 9.7%), E21B (drilling and wells, 7.2%), G01L (force and pressure measurement, 6.8%), G01N (material analysis, 6.0%), and the control classes G05D and G05B. Because a single record can carry multiple IPC classes, these shares add up to more than 100%, and a search limited to G01F alone would miss relevant prior art sitting in the adjacent classes.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Differential Pressure Flow Measurement covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.