Cable Ampacity Patents: Who Leads, Where the Gaps Are 2026
Cable Ampacity and Thermal Design Patents: Leaders, Trends and Filing Gaps
60.0% concentration. The top 5 of 44 ranked assignees hold 72 of 120 records in scope — filing here is already concentrated at the top, not wide open. Filings peaked at 6 in 2018 and have since run at a low, flat rate — 2 filings in both 2021 and 2024, a 0% change across that span. 2025 and 2026 show fewer published records, but publication lags filing by roughly 18 months, so those final years are still filling in rather than signalling genuine decline.
- 1PRYSMIAN SPA28
- 2UNDERGROUND SYSTEMS INC16
- 3PRYSMIAN CAVI E SISTEMI ENERGIA SRL12
- 4LOCTITE (IRELAND) LIMITED8
- 5LOCTITE CORP8
See the full cable ampacity and thermal design 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 on cable ampacity patents
Who holds the most patents in cable ampacity and thermal design?
One assignee leads the ranked list with 28 of the 120 records in scope, well ahead of the fifth-place figure of 8 and the tenth-place figure of 4. That gap marks this as a leader-plus-long-tail field: a single company has built a substantial position while 44 assignees in total are ranked, most holding only a handful of records each. Anyone entering this space should expect to design claims around that leader’s existing footprint rather than assume open ground.
Is patent filing in cable ampacity and thermal rating growing or shrinking?
The filing count held flat at 2 in both 2021 and 2024, a 0% change across that span, after peaking at 6 in 2018. Published counts for 2025 and 2026 look lower, but publication typically lags filing by around 18 months, so those recent years are still incomplete rather than evidence of decline. The honest read is a mature, low-but-steady filing rate rather than a growing or a collapsing field.
What technologies dominate cable ampacity patent claims?
Cable and conductor construction (IPC class H01B) accounts for 27.5% of the 120 records in scope, and electric/magnetic measurement (G01R) for 20.8%, making these the two dominant claim bodies. Temperature measurement (G01K, 14.2%) and power grid systems (H02J, 13.3%) form a second tier. Because records often carry multiple IPC classes, connector, circuit-board and optical-sensing elements also appear at double-digit shares, showing that many claims bundle ampacity with an adjacent hardware or sensing component rather than standing alone.
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 Cable Ampacity and Thermal Design 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.