US Patent 9539734 Shaving razors and shaving cartridges

A shaving blade unit includes a housing having a top surface, a bottom surface, a front edge, a rear edge, and a pair of side edges extending between the front edge and the rear edge, the housing having at least one blade disposed between the front edge and the rear edge, the at least one blade having a cutting edge, and a pair of retainers each having a top portion, a bottom portion, and a portion connecting the top portion to the bottom portion, the retainers extending along the pair of side edges between the front edge of the housing and the rear edge of the housing.