Filing in this space is concentrated among a small number of established turbine OEMs, led by a Danish manufacturer whose portfolio includes multiple co-assignee filings with named individual inventors. Several other large OEMs — spanning US, Spanish and Norwegian entities — appear in the ranking but show no filings in the most recent tracked year. This pattern is typical of a field where the foundational architecture is largely staked and the leading players are maintaining rather than rapidly expanding their claim positions.

Filings in this dataset rose to a peak of 40 in 2020 before easing toward 19 by the 2022 midpoint, which suggests the core mechanical and control-loop claims for cut-in/cut-out management and individual pitch control were largely filed in the back half of the 2010s. Publication lags filing by roughly eighteen months, so recent years will always look thinner than they eventually turn out to be. Even accounting for that lag, the trend reads as flat-to-declining rather than an accelerating field.

Individual pitch control lets a turbine adjust each blade's pitch angle independently rather than moving all blades together, which lets the controller counteract asymmetric loading caused by wind shear, yaw misalignment or turbulence across the rotor plane. It shows up heavily in this landscape because it directly addresses load mitigation, one of the core search terms, and because it sits at the intersection of the mechanical (F03D) and control-electronics (G05B, H02P) classes that dominate the dataset. Patents combining individual pitch control with lidar-based wind sensing are among the most-cited records in the set.

Europe, filed through the EPO, leads with 138 records, ahead of the United States at 115 and the WIPO/PCT route at 48. China and India each account for 24 records, with Austria (AT) close behind at 19. A search or freedom-to-operate check limited to the USPTO alone would miss a substantial share of the global filing activity in this field, particularly the EPO-heavy European OEM filings.

The core mechanical and control claims around cut-in/cut-out speed, power curve shaping and individual pitch are densely filed under F03D, but supporting IPC classes such as G01S (radar/positioning), H02J (grid/power supply integration) and G06F (digital processing) show much lower filing counts relative to the core. That gap points to under-claimed territory in sensor-fusion-driven yaw correction, grid-fault ride-through control tied to pitch systems, and digital-twin-based power curve estimation — areas where the mechanical foundation is settled but the control-software layer built on top of it is thinner.