Catheters; medical devices for placing and securing catheters, namely, endoscopes; tubing for use with catheters; urethral catheterization instruments in the nature of catheters; medical apparatus for urethral catheterization; medical instruments for application on animal bodies, namely, lasers for medical use; medical apparatus and instruments for medical image diagnostics, namely, fiber optic catheters; medical instruments, namely, lasers for medical purposes and catheters for endoscopic de...