U.S. federal trademark · Serial No. 72145062 · Reg. No. 0760740
DIAPHRAGMS OF VARIOUS TYPES SUCH AS FLEXIBLE ELASTOMERIC SEALS AND RUBBER SLEEVES USED AS FLEXIBLE DIVIDING MEMBERS SPANNING THE GAP BETWEEN A MOVING MEMBER AND A STATIONARY MEMBER OF DEVICES SUCH AS CYLINDERS OR VALVES TO PREVENT INTERCHANGE OF A FLUID OR GASEOUS MATERIAL BETWEEN TWO SEPARATED AREAS OR CHAMBERS IN THE CYLINDER OR VALVE
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