Thin film memory apparatus

Claim 1

A MAGNETIC MEMORY DEVICE COMPRISING, IN ASSEMBLED CONDITION A PAIR OF NON-MAGNETIZABLE SUBSTRATA JUXTAPOSITIONED RELATIVE TO EACH OTHER, AT LEAST A PAIR OF SUBSTANTIALLY CLOSED MAGNETIC CIRCUITS FORMED ON SAID SUBSTRATA MAGNETIZABLE BY RELATIVE ENERGIZING MAGNETIC FIELDS AND EACH COMPRISING, ON EACH SUBSTRATA A MAGNETIZABLE ELEMENT MAGNETIZABLE TO TWO STABLE STATES OF MAGNETIZATION, SAID ELEMENTS COMPRISING A PAIR OF FILMS DEPOSITED EACH ON A RESPECTIVE SUBSTRATUM HAVING CONFIGURATIONS WHICH ARE MIRROR IMAGES OF EACH OTHER, SAID FILMS BEING RELATIVELY THIN AND DIPOSED SUBSTANTIALLY IN THE PLANE OF THE SURFACE OF THE SUBSTRATA ON WHICH THEY ARE DISPOSED, AT LEAST ONE CONDUCTOR FORMING A CONDUCTIVE ELECTRICAL PATH PASSING THROUGH AT LEAST ONE OF SAID PAIR OF MAGNETIZABLE FILMS AND ELECTRICALLY INSULATED FROM SAID FILMS FOR ENERGIZING SAID FILMS TO MAGNETIZE THEM ALTERNATIVELY TO SAID TWO STABLE CONDITIONS, AND SAID FILMS BEING DISPOSED ON SAID SUBSTRATA SO AS TO BE DISPOSED OPPOSITE OF EACH OTHER IN AT LEAST CLOSE PROXIMITY TO JOINTLY FORM SAID CLOSED MAGNETIC CURCUITS, WHEREBY AN OUTPUT SIGNAL OF POSITIVE OR NEGATIVE POLARITY AND REPRESENTATIVE OF ONE BIT OF INFORMATION CAN BE DERIVED, FROM SAID CONDUCTOR OR INDEPENDENCE UPON THE STATE OF MAGNETIZATION OF SAID FILMS.