The trademark law protects those marks that are used in good faith. The purpose of this provision is to prevent that the trade mark proprietor through the application can bring the competition to a standstill and create a monopoly. After the so called grace period of five years, everyone can obtain the cancellation of a non-used trade mark. The trade mark proprietor does well to use effectively the registered mark and to document its use. If necessary he should, on a voluntary basis renounce the protection of a non-used trade mark.