File One of These to Protect Your Invention
This page is the CodyCross answer for the clue below from Germany, Group 2191, Puzzle 3 (Contact Lenses).
Question is: File One of These to Protect Your Invention
and the answer is: PATENT
Word Meaning:
PATENT — An official document granting an appointment, privilege, or right, or some property or title; letters patent.
Definitions from Wiktionary.