Maybe because it's Paice, not Toyota that holds all the hybrid patents - Paice sued many car manufacturer and won - Toyota, Ford, Kia, and Hyundai (and others?)

Maybe because it's Paice, not Toyota that holds all the hybrid patents - Paice sued many car manufacturer and won - Toyota, Ford, Kia, and Hyundai (and others?) - all had to "license" from Paice.