No single assignee holds a dominant share of this 193-family corpus; the strongest relationships found are co-filing links between individual inventors rather than a large corporate portfolio. Ocean Power Technologies Inc appears among the named assignees but currently shows zero filings in the latest year. This fragmentation means a competitor analysis should track several small filers and independent inventor teams rather than assuming one or two majors control the space.

Filing activity peaked at 43 families in 2021 and had eased to 29 by the 2022 midpoint, with no later year surpassing that peak. Because publication lags filing by around eighteen months, the final one to two years in the trend are undercounted, but the overall shape is flat-to-declining rather than accelerating. Anyone assessing this space should treat it as past its filing surge, not entering one.

The bulk of claims sit in F03B, hydraulic machines and engines, which covers 125 of the 193 families in this dataset. B63B, ships and marine vessels, is the second largest at 76 families, followed by supporting subclasses for pumps (F04D, F04B), electrolytic production (C25B) and generators (H02K). This spread shows hull design is usually claimed as part of a wider energy-conversion or power take-off system rather than as an isolated structural invention.

The IPC composition shows heavy concentration in F03B and B63B, so branches that combine hull structure with hydrogen production, modular multi-body arrays, or in-hull generator integration show comparatively thinner density and are worth a dedicated search. Corrosion-resistant hull material claims and screw-actuator power take-off variants also appear less saturated relative to the hydraulic core. A targeted novelty search on these specific combinations, rather than the hull concept broadly, is the more productive starting point.

WO2019050466A1, filed by Ocean Harvesting Technologies AB, claims a wave energy converter combining a buoy with a screw actuator that converts linear buoy motion into rotary motion for a power take-off device. It is representative of the corpus's tendency to bundle hull or buoy structure with a specific mechanical conversion method rather than claiming hull geometry alone. Whether it blocks a new design depends on whether that design uses a comparable linear-to-rotary screw mechanism inside the buoy; hull shapes paired with different conversion approaches would sit outside its specific claim scope, though a full claim chart review is needed to confirm this for any specific product.