US Patent 10554239 Protective case assembly for handheld device

A protective case assembly for a handheld device includes a casing body and a frame. The handheld device has a device front surface, a device back surface opposite to the device front surface, and a device peripheral surface connected between the device front surface and the device back surface. The casing body is configured to surround the device peripheral surface. The frame is detachably connected to the casing body and has a frame inner peripheral surface defining a central hollow portion for exposure of the device back surface.