> Eventually I developed a little ridge on the perimeter, [like an airfoil]. I think he's referring to the little lip around the outer edge? Anyway, nice inte

> Eventually I developed a little ridge on the perimeter, [like an airfoil]. I think he's referring to the little lip around the outer edge? Anyway, nice interview. Stories like Mr. Adler's are inspiring, it's hardly an accident that he comes up with two paradigm-shifting inventions in two completely different fields.