Around 1900, seven brothers named Jacuzzi immigrated to the United States from Italy. They eventually settled on the West Coast in Berkeley, California and became machinists. One of them, Rachele, began making aircraft propellers, inspired by an airshow he had seen at the 1915 Panama Pacific Exposition in nearby San Francisco. They designed a unique propeller known as the "Jacuzzi toothpick". Rachele and his brothers created an aircraft manufacturing company in Berkeley called "Jacuzzi Brothers", which remained in business until 1976, although their product line changed over the years. One accomplishment of the company was the first enclosed cabin monoplane, which was used by the U.S. Postal Service to carry passengers from the San Francisco Bay area to Yosemite National Park.