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Canada's Nikola Tesla, Frank Zamboni, it turns out was not Canadian and invented the Zamboni® ice resurfacer in Los Angeles California. He had an ice-selling business, but with the advent of refrigeration he had spare refrigeration equipment which he used to open an ice rink.
I wonder if the Zamboni company remains privately held? Seems like a good niche business. https://en.wikipedia.org/wiki/Frank_Zamboni …
