Trademark Protection of Letters Law and Legal Definition

Alphabetic and Alphanumeric characters can be protected under trademark law. They are the most common form of trademark, otherwise known as textual or lingual marks. Such textual marks receive their broadest protection if they are used as trademarks in block-letter format, without specialized fonts, coloring or other stylized features. If lingual marks are used with stylized features, but registered as block letters alone, or used in a variety of different stylized formats, then protection can extend to all similar configurations of letters.