Patent ID: 6934424

Claim:
A molecular system having at least three branches, with one end of each branch connected to an immobile junction unit, with two of said branches on one side of said junction unit and with at least one other branch on the opposite side of said junction unit, wherein either: said molecular system comprises three branches, wherein said two branches each contain an immobile stator unit in its backbone, and said two branches each further contain at least one rotatable rotor unit in its backbone between said stator unit and said junction unit; or said molecular system comprises four branches, with two of said branches on one side of said junction unit and with two other said branches on the opposite side thereof wherein each branch contains contain an immobile stator unit in its backbone, and each branch further contain a rotatable rotor unit in its backbone between said stator unit and said junction unit, wherein each rotor unit rotates between two states as a function of an externally-applied field.