Copper Tube Manufacturing Patents: Top Companies & Trends 2026
Copper Tube Manufacturing for Heat Exchangers: Patent Trends
70.8% of all 48 records sit with just five assignees, so most of the claim space in drawing, wall-thinning and brazing-joint quality is already staked out by a small group. Filings rose to a peak of 10 records in 2021, then fell to 2 by 2024 — an 80% drop over that three-year span, the steepest contraction in the coverage window. Earlier years, such as 2017 with 6 records, show the field was already active well before the peak. 2025 and 2026 figures are still incomplete due to publication lag and are not a reliable basis for calling the trend's current direction.
- 1HYDRO EXTRUDED SOLUTIONS AS12
- 2FURUKAWA ELECTRIC CO LTD7
- 3NJT COPPER TUBE CORP6
- 4KOBELCO & MATERIALS COPPER TUBE LTD5
- 5KOBE STEEL LTD4
See the full copper tube manufacturing for heat exchangers 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 are the leading patent holders in copper tube manufacturing for heat exchangers?
The dataset’s assignee ranking lists 14 companies, with the top-ranked holder alone accounting for 12 of the 48 records in scope. The top five combined hold 70.8% of all records, meaning most active claim space sits with a small group of established manufacturers rather than being spread widely. Anyone entering this field should expect dense prior art from that leading group specifically, not from the field generally.
Is patent filing activity in this field growing or shrinking?
Filing peaked at 10 records in 2021 and fell to 2 records by 2024, an 80% decline over that three-year span — the sharpest contraction in the coverage window. However, publication typically lags filing by around 18 months, so the 2025-2026 figures in this dataset are still incomplete and should not be read as confirming a continued decline. The safest reading is that the field cooled significantly through 2024, with the current trajectory not yet visible.
What technology areas dominate copper tube manufacturing patents?
Metal extrusion and drawing (B21C) and alloy composition (C22C) each appear in 47.9% of the 48 records, with heat-exchanger structural details (F28F) close behind at 45.8%. Non-ferrous metal treatment (C22F) covers 35.4% of records. Because a single record can carry multiple IPC classes, these figures overlap rather than sum to 100%, reflecting how manufacturing process and end-use design are typically claimed together in one filing.
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 Copper Tube Manufacturing for Heat Exchangers 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.