Toyota Motor Corp plans to offer royalty-free access to its hybrid-vehicle technology patents as early as this year, the Nikkei Asian Review reported. Toyota, which holds roughly 20,000 active patents in the field, is expected to make accessible most of the latest ones covering motors, power converters and batteries. Since pioneering the Prius, the world's first mass-produced hybrid car, in 1997, Toyota has sold more than 12 million cars featuring the technology, which twins a conventional gasoline engine and electric motor, saving fuel by capturing energy during coasting and breaking and using it to power the motor. Hybrid vehicles account for around 3 percent of all vehicles sold globally, eclipsing the roughly 1 percent share of all-battery EVs. Toyota vehicles account for more than 80 percent of the hybrid vehicle market. Global automakers have pledged to electrify their vehicle offerings in the coming years amid tightening global emissions regulations, but many acknowledge that shifting to all-battery EVs will take time due to the high cost of the required batteries. Toyota has long held to its belief that its hybrids, whose fuel efficiency is roughly double that of gasoline cars, are a cost-effective alternative to all-battery EVs, due to their lower cost, lack of need for charging infrastructure, and because they operate more or less like gasoline cars.