Safety razor entitled "Fuck Everything, We're Doing Five Blades" predicted the release of five-blade cartridges, two years before their commercial introduction. South Korean manufacturer Dorco released their own six-blade cartridge in 2012, and later released a seven-blade cartridge. Gillette has also produced powered variants of the Mach3 (M3Power, M3Power Nitro) and Fusion (Fusion Power and Fusion Power Phantom) razors. These razors accept a single AAA battery which is used to produce vibration in the razor; this action was purported to raise hair up and away from the skin prior to being cut. These claims were ruled in an American court as "unsubstantiated
Segal Lock and Hardware Company stock was placed privately with no public offering made. The company acquired a controlling interest in the Norwalk Lock Company and the Universal Razor Blade Corporation in 1929. Stockholders approved an increase in the authorized stock of the company to 400,000 shares, of which 300,000 shares were outstanding. The corporation introduced a single-unit safety razor in late 1930, a low-priced product designed to use only Segal double-edged blades. The following year Segal placed on the market the Unimatic Segal Razor, a one-piece razor which accepted a double-edged blade. The firm entered a contracted with United Cigar Stores in June 1931.