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.
United States Cartridge Company United States Cartridge Company The United States Cartridge Company was an early manufacturer of cartridge ammunition for small arms. The company was founded in 1869 by American Civil War general Benjamin Butler. Company startup was during the most rapid evolution of cartridge design to date. Lowell, Massachusetts emerged as one of the most successful cartridge producers in the United States while Butler served as a congressman from Massachusetts from 1867 to 1879 and as governor from 1883 to 1884. After supplying 65 percent of American small arms ammunition production for World War I, the company was acquired by the owner