The drivetrain was actually invented several decades before that. It wasn't until around 20 years ago that the batteries got to the point to make it practical to use.
They're also made by more than Toyota and Honda. The American automakers have been offering vehicles with a similar hybrid powertrain for around two decades and the German automakers for only a little less than that. But they're generally not a separate model like the Prius is, so the only exterior difference is a hybrid badge on what is otherwise visually identical to the non-hybrid car/truck of the same model.
They're also made by more than Toyota and Honda. The American automakers have been offering vehicles with a similar hybrid powertrain for around two decades and the German automakers for only a little less than that. But they're generally not a separate model like the Prius is, so the only exterior difference is a hybrid badge on what is otherwise visually identical to the non-hybrid car/truck of the same model.