Medical devices, namely, catheters for removal of occlusions from vessels, bronchial pathways; Medical devices, namely, cannulas and catheters for removing clot, thrombus, and other undesirable material; medical devices, namely, catheters used for removal of a thrombus; medical devices, namely, catheters for the therapeutic treatment of pulmonary embolism and deep vein thrombosis; Medical devices, namely, retrievers for use in radiology, neuroradiology, cardiology, and surgery, for treating pulmonary embolism and peripheral arterial disease, and surgical devices in the nature of retrievers for performing thrombectomy and retrieval of emboli, clots and foreign bodies; surgical devices, namely, thrombectomy devices and structural parts therefor; catheters; Medical devices, namely, access catheters for providing controlled fluid access to the body; medical instruments in the nature of a valve and hub system for connection and disconnection of suction to an aspiration catheter; medical instruments in the nature of a valve and hub system for achieving hemostasis during removal of an occlusion or thrombus; Medical devices, namely, catheters for application of aspiration during a medical procedure; Medical devices, namely, catheters for application of aspiration during thrombectomy, pulmonary embolism removal and retrieval, peripheral arterial disease treatment procedures, and large bore femoral closure procedures, all of the foregoing for use in humans