US Patent 11771240 Containment system for the display of animals

A modular shelving system includes a plurality of shelves, each shelf having a length and defining a first passage, a second passage, a first channel, and a second channel that each extend the full length of their respective shelf. The system also includes a plurality of bars, each bar defining a length and including a first bar opening at a first end and a second bar opening at a second end opposite the first end, and a plurality of connectors, each connector including at least two male portions, each male portion sized and shaped to be received in one of the first passage, the second passage, the first bar opening, and the second bar opening to interconnect each of the plurality of shelves and each of the plurality of bars.