Key holder with pivotal, rotatable key hangers in separate key compartments

Claim 1

A KEY HOLDER COMPRISING A RELATIVELY RIGID PLATE AND A PAIR OF CASING ELEMENTS OVERLYING OPPOSITE FACES OF SAID PLATE; SAID ELEMENTS HAVING ELONGATE, PARALLEL COALIGNED CENTRAL MOUNTING PORTIONS AND EACH OF SAID ELEMENTS INCLUDING A PAIR OF STIFF DOORS, HINGES CONNECTING SAID DOORS TO OPPOSITE SIDES OF THE ELEMENTS; SAID MOUNTING PORTIONS, EACH OF SAID DOORS, WITH SAID PLATE AND SAID MOUNTING PORTIONS, DEFINING KEY COMPARTMENT; THE KEY HOLDER FURTHER COMPRISNG MEANS FOR YIELDABLY RETAINING SAID DOORS IN CLOSED POSITIONS IN CLOSE RELATION TO SAID PLATE, HOLDING MEANS COACTING WITH THE MOUNTING PORTIONS OF THE TWO CASING ELEMENTS TO HOLD SAID MOUNTING PORTIONS, RELATIVELY RIGIDLY TOGETHER WITH SAID PLATE HELD THEREBETWEEN, AND SEPARATE KEY HANGERS PIVOTALLY AND ROTATABLY CONNECTED TO THE KEY HOLDER, WITHIN EACH KEY COMPARTMENT IN POSITION TO SWING OUTWARDLY WHEN THE RELATED DOOR IS OPEN, TO PROTRUDE FROM THE KEY HOLDER WHEREBY TO RENDER A KEY HUNG THEREON, ACCESSIBLE FOR USE.