A new report from GWEC Market Intelligence shows that the offshore wind sector has grown 21% on average every year since 2013, taking its total installed capacity to 23 GW globally. GWEC sees potential for the sector to add between 190 GW and 200 GW by 2030. China is expected to become the largest offshore region globally. Ocean Power Technologies has been awarded another US patent for its Power Take-Off System which part of the mechanical PB3 PowerBuoy. The Buoy floats and move independently from the whole spar, and that converts into a circular movement via a ball-screw which drives a generator. Really, something that simple has to be pre-existing surely. Wave power needs more than patent trolls, it…