US Patent 11256038 Reversible polarity MPO fiber optic connector

In a mateable pair of MPO connectors, a first connector has a first key structure and a second key structure, each of which is moveable between a first position and a second position thereof. When the first key structure is in the first position, the second key structure is in the second position and vice versa. The second connector similarly has a first key structure and a second key structure, each moveable between a first position and a second position thereof, and when the first key structure is in the first position, the second key structure is in the second position and vice versa. A polarity of at least one of the first connector and the second connector is reversible without disassembly thereof.