Without looking up the exact quote, I'll paraphrase something else that he said.

"I didn't invent anything. I discovered a lot of things that didn't work."

A friend told a story about visiting another out of state friend, and noticed he was propping up his garage door for ventilation with a Mac amp chassis. My friend asked if he could go to Home Depot, pick up a concrete block to replace the the Mac amp as a door prop and take the Mac amp off his hands.. The friend agreed. It was a win/win.

I believe Viagra and Silly Putty are two famous examples of that.

“If Stupidity got us into this mess, then why can't it get us out?”

― Will Rogers