MEDICAL AND DENTAL RADIOGRAPHIC AND FLUOROSOPIC MACHINES AND APPARATUS FOR TAKING AND PROJECTING X-RAY PHOTOGRAPHS

HEAD DRIVE FOR A VERTICAL CONVEYOR USED IN GRAIN ELEVATORS

METAL ALLOYS HAVING A HEAVY-METAL BASE, AND PARTICULARLY FOR CHROMIUM IRON ALLOYS IN THE FORM OF CASTINGS, BARS, PLATES, SHEETS AND THE LIKE

DEVICE USED FOR THE COLLECTION OF BLOOD SPECIMENS