This landscape counts 215 published records across the 2015-2026 window, and because family and record counts coincide in this scope, that figure is also the family total. The count spans receiving offices including the United States, the EPO, WIPO/PCT, India and Germany, so it reflects global filing activity rather than a single jurisdiction. Readers should treat 2025-2026 figures as undercounts, since publication typically lags filing by around 18 months.

The ranking covers 37 companies, with the leading assignee holding 44 records against 14 at fifth place and 6 at tenth — a steep concentration where the top 5 assignees together hold 63.3% of all 215 records and the top 10 hold 80.0%. That leaves a long tail of smaller filers, mostly wind turbine OEMs, blade specialists and their service divisions, each with only a handful of records. Co-filing between separate companies is rare in this field; most IP here is developed in-house.

Filings rose sharply to a peak of 67 in 2021, then fell to 10 by 2024, an 85% decline over that three-year span. That drop should be read as the field settling around proven receptor-and-down-conductor architectures after a period of active experimentation, not as declining interest, since 2025-2026 numbers are still incomplete due to publication lag. Anyone tracking momentum should treat 2024 as the most recent complete year.