US Patent 11358787 Modular cargo containers with surface connectors

Certain aspects of the present disclosure provide a modular container, including: six sides, wherein: each side of the six sides of the modular container comprises at least four surface connectors, each surface connector of the at least four surface connectors comprises at least two connector elements, at least one connector element of the at least two connector elements is of a first type, and at least one connector element of the at least two connector elements is of a second type; and an access door in at least one side of the six sides.