US Patent 10395796 Flat cable and waterproof cable

A flat cable that includes a plurality of cores each including one insulated wire and/or a plurality of insulated wires that are twisted together, the cores being lined up in a cable width direction, which is orthogonal to a longitudinal direction of the insulated wires; a sheath that collectively covers the plurality of cores; and a space that is surrounded by an outer surface of one of the plurality of cores, an outer surface of another one of the plurality of cores that is adjacent to the one of the plurality of cores, and an inner surface of the sheath.