DETROIT -- In the back aisles of the Society of Automotive Engineers recent convention, past the displays hawking springs and sprockets, one family's dream began to take shape. Scuderi Group of West Springfield, Mass., didn't have to look far to fill its offices. Salvatore Scuderi, company president, has engineering and law degrees. So does Stephen, his brother, the company's patent attorney. Another brother, Nick, runs marketing; sister Deborah handles accounting. Six of the eight Scuderi siblings made the trip to Detroit's Cobo Center, in service of their late father Carmelo Scuderi's invention. The results of the years of work on...