Yves Garel’s skatebike patent was filed in 1981. Garel was from France, as was the Motobecane Rodéocycle. My guess is this was the first commercial version of his patent.
Motobécane was a French manufacturer of bicycles, mopeds, motorcycles, and other small vehicles, established in 1923. “Motobécane” is a compound of “moto”, short for motorcycle; “bécane” is slang for “bike.”
Videos on the Rodeocycle (all in French)