Razor be used on both sides, with two open edges. The blade on the double-edged safety razor is slightly curved to allow for a smoother and cleaner shave. In 1901, the American inventor King Camp Gillette, with the assistance of William Nickerson, patented a new variation of safety razor with disposable blades. Gillette realized that a profit could be made by selling an inexpensive razor with disposable blades. This has been called the razor and blades business model, and has become a very common practice for a wide variety of products. Many other brands of safety razors have come and gone.
American Safety Razor Company product, the Gem Safety Razor, borrowed heavily from the Star Razor in design but soon outpaces the Star in sales. In 1903 Jerry Reichard leaves Gem Safety Razor Company to form yet another razor and blade producer, along with August Scheuber the company was briefly named 'Reichard & Scheuber Manufacturing Company' before it became 'The Yankee Company'. The Yankee Company made wedge-blade razors under the name Yankee, Mohican & Winner. The Yankee Company, is renamed Ever-Ready in 1905. Gem & Ever-Ready merge in 1906 and is incorporated as the Personna American Safety Razor Company. In 1906, abandoning the wedge-blade design,