Bill invented the method of using a hot branding iron to permanently put the mark of a ranch on a cow's skin.
VOA: special.2011.06.11
His method is to scour the market for a hot stock, then dig into its financials and interview outside experts in the target's field, trying to see if its business plan and products hold up.
"My project involved a method for treating leather so that it stayed warm to the touch in a hot environment and warm to the touch in a cool environment, " he said.