State-run Bharat Heavy Electricals Ltd (BHEL) spent Rs 829 crore on research and development efforts during the 2009-10 fiscal,which was 20 per cent higher than last year. BHEL invested an all-time high of Rs 829 crore on research and development (R&D) efforts - 20 per cent more than the previous year,an official statement said. During the year,264 patents and copyrights were filed by the company,translating into filing of one patent/copyright every working day,it said. As a result of constant thrust on developing new products and technologies,BHEL has recorded 27 per cent growth in its intellectual capital in FY'10,the statement added. "With R&D spend at 2.4 per cent of its turnover,BHEL is the highest spender on R&D in India for its kind of industry," it claimed. Commercialisation of products and systems developed by in-house R&D contributed around 20 per cent to the company's total turnover of Rs 34,050 crore in FY'10. Significant developments during the year include a new design variant of condenser for 660 MW steam turbines having supercritical parameters and high temperature superconducting power transformer,among others.