Related Clues:

• Register (an invention)
• Having stroke at hospital department is unmistakeable
• Inventor's licence
• Pole touring fine moving show
• Obvious; demonstrate
• Licence for inventors; obvious
• It's obvious to father providing temporary accommodation
• Clear, inventory
• Obvious safeguard for inventor
• The finest possible head master: that's obvious
• Obvious way to protect one's invention
• The answer is obvious. Protect it by law
• Fine mast (anag.)
• Item fans resolved to exhibit
• The finest possible mother, for a start. That is obvious