I thought this was cool:
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Ed created the "Rings of Headrick" for the top of the Frisbee(R) which made it fly smoother and more consistently when thrown with power.Oh. Point - Ed Headrick didn't invent the Frisbee. He bought it from Fred Morrison. Ed invented the Basket and the PDGA though.
Interesting that this was shortly after he invented the frisbee. I'm guessing he hadn't even thought up the concept of disc golf yet at that time. Pretty cool window to the past.