Synthetic rubber and chemicals manufacturer JSR Corp. (TYO:4185) has developed a 3D-printed prosthetic leg in a joint project with All Nippon Airways Co. Ltd. (ANA) and prosthesis manufacturer SHC Design Inc. The company intends to support efforts to commercialize the tool. Current prosthetic legs are typically made from metal and cost a pricey 300,000 to 400,000 yen ($2,953 to $3,937)….