Wave & Tidal Energy Patents

Wave and tidal energy patents cover tidal-stream-turbine innovations; tidal-kite and novel-device innovations; wave-energy-converter (WEC) innovations; and power-take-off, mooring, and survivability innovations — with IP held by tidal-turbine developers, wave-energy-converter companies, and novel-device pioneers (in a young, pre-commercial field). MAJOR WAVE/TIDAL PATENT HOLDERS: TIDAL — ORBITAL MARINE POWER (O2 floating tidal turbine, twin rotors on a floating hull with retractable legs, EMEC Orkney); SIMEC ATLANTIS / SAE RENEWABLES (the AR/Proteus seabed-mounted horizontal-axis turbines, MeyGen — the largest tidal-stream array); MINESTO (Deep Green 'tidal kite' — a tethered underwater wing that flies in a figure-eight to multiply flow speed through a turbine); NOVA INNOVATION (seabed turbine arrays, Shetland); SABELLA, Verdant (RITE East River), and Proteus. WAVE — CORPOWER OCEAN (point absorber with WaveSpring phase-control/negative-spring and a storm-survival mode); OCEAN POWER TECHNOLOGIES (PowerBuoy point absorber); ECO WAVE POWER (onshore/breakwater-mounted floaters); CARNEGIE CLEAN ENERGY (CETO submerged point absorber); MOCEAN ENERGY (hinged-raft/attenuator); AWS Ocean, Wello, and CalWave. The field is young and comparatively open; tidal-stream turbines, point-absorber wave devices, and power-take-off are the core patent domains.

Tidal-stream-turbine rotor and control innovations; foundation and deployment innovations; tidal-kite and oscillating-device innovations; and array and subsea innovations represent core tidal-energy patent domains — and surviving and economically harvesting strong, reversing tidal flows is the central tidal challenge. TURBINE PATENTS: horizontal-axis tidal-stream turbine rotor/blade design (hydrofoil profiles for dense seawater), blade-pitch control (power limiting and load shedding in strong flows), bidirectional operation or yaw to face the reversing tide, and nacelle/drivetrain sealing for subsea operation. FOUNDATION / DEPLOYMENT PATENTS: gravity-base, pin-pile, and floating-platform foundations, retractable/raisable turbine legs for maintenance access (Orbital's floating-and-retractable design), and quick-connect subsea installation. NOVEL-DEVICE PATENTS: tidal kites (a tethered underwater wing flying a figure-eight to accelerate relative flow through a small turbine — Minesto, enabling lower-velocity sites), oscillating hydrofoils, ducted/shrouded turbines (augmenting flow), and vertical-axis cross-flow turbines. ARRAY / SUBSEA PATENTS: turbine spacing and wake management in arrays, subsea cabling and connectors, condition monitoring, and biofouling/corrosion protection. Tidal-stream rotor/pitch control, floating retractable platforms, and the tidal-kite concept are the highest-value tidal IP because they address survivability, maintainability, and access to lower-velocity sites.

Wave-energy-converter (WEC) architecture innovations; power-take-off (PTO) innovations; control and phase-tuning innovations; and survivability and mooring innovations represent additional wave/tidal patent domains — and the power-take-off plus survivability are the make-or-break challenges for wave energy. WEC-ARCHITECTURE PATENTS: point absorbers (a buoy heaving relative to a fixed/submerged reference — CorPower, OPT, Carnegie), oscillating water columns OWC (waves drive an air column through a turbine), attenuators (multi-segment hinged rafts — the Pelamis lineage, Mocean), oscillating wave-surge converters (bottom-hinged flaps), and overtopping devices. PTO PATENTS: the power-take-off converting slow, high-force oscillation to electricity — hydraulic (accumulator-smoothed), direct-drive linear generators, pneumatic (Wells/impulse air turbines for OWC), and mechanical/ballscrew — PTO efficiency and reliability under irregular loading is a core differentiator. CONTROL / PHASE-TUNING PATENTS: latching and phase control / reactive control that tunes the device to resonate with incoming waves to dramatically boost capture (CorPower's WaveSpring negative-spring is a patented example), and predictive wave-by-wave control. SURVIVABILITY / MOORING PATENTS: storm-survival modes (de-tuning, submerging, or detensioning to shed extreme loads — the existential wave-energy problem), mooring systems for compliant station-keeping, and fatigue/biofouling design. Phase-control/resonance tuning and storm-survival PTO/mooring are the highest-value wave-energy IP because they determine both energy capture and whether the device survives.

Wave and tidal energy startup IP strategy operates in a young, pre-commercial, comparatively open field — but must navigate Orbital/SIMEC Atlantis tidal-turbine patents, CorPower/OPT/Carnegie wave-device patents, Minesto tidal-kite patents, decades of academic and failed-pioneer prior art (Pelamis, Oyster, and many wave-energy attempts that failed and whose IP is instructive), marine/offshore engineering prior art, and the reality that survivability and cost-of-energy — not just IP — decide success; understand that the basic device categories (point absorber, OWC, tidal-stream turbine) are well-described prior art, so the durable IP is in specific control/phase-tuning, PTO, survivability/mooring, and novel devices (tidal kite), and that demonstrated survivability and levelized-cost are as decisive as patents; identify whitespace in phase/resonance control, reliable efficient PTO, storm-survival mechanisms, lower-velocity-site devices, and array/installation cost reduction. WAVE/TIDAL STARTUP IP STRATEGY: DEVICE CATEGORIES ARE PRIOR ART — CONTROL, PTO, AND SURVIVABILITY ARE THE IP: point absorbers, OWCs, and tidal turbines are well-trodden concepts, so patent the specific phase/resonance control, power-take-off, and storm-survival/mooring that make a device economic and survivable; PHASE/RESONANCE CONTROL AND STORM SURVIVAL ARE HIGHEST-VALUE: tuning a device to resonate with waves (CorPower WaveSpring-style) multiplies capture, and surviving storms is the existential problem — both are patentable and decisive; NOVEL DEVICES FOR LOWER-VELOCITY/UNTAPPED SITES ARE OPEN WHITESPACE: tidal kites (Minesto) and devices that work at lower flow speeds expand the resource and are less-consolidated; LEARN FROM FAILED PIONEERS: Pelamis/Oyster and others failed on survivability/cost — their IP and failures inform design-arounds and what to patent; SURVIVABILITY AND LCOE ARE PARALLEL MOATS: demonstrated ocean survival and competitive levelized-cost-of-energy matter as much as patents to investors and utilities; WHEN TO PATENT: NOVEL DEVICE/CONTROL WITH MEASURED PERFORMANCE: file once a device shows measured results (capacity factor + capture width ratio + PTO efficiency + survived sea-state + LCOE) vs. existing tidal/wave baselines — measured capacity factor, capture efficiency, survivability, and levelized cost are the critical marine-energy IP metrics; KEY FTO CHECKLIST: Orbital O2 floating retractable-leg twin-rotor tidal turbine; SIMEC Atlantis/Proteus seabed horizontal-axis MeyGen; Minesto Deep Green tidal kite figure-eight; tidal blade-pitch bidirectional/yaw foundation; CorPower point absorber WaveSpring phase-control storm-mode; OPT PowerBuoy; Carnegie CETO submerged; Mocean attenuator hinged-raft; OWC Wells/impulse turbine; PTO hydraulic/direct-drive-linear/pneumatic; latching/reactive phase control; storm-survival de-tuning/mooring; Pelamis/Oyster prior art.