Repeating patterns marks can function as trademarks. TMEP 1202.19 ("Repeating-pattern marks are often applied to clothing and fashion accessories, but they also appear on other goods, including furniture, bedding, dinnerware, luggage, paper products, and cleaning implements. In addition, these marks frequently appear on packaging for a variety of goods and have been registered for use in connection with services such as retail stores and travel agencies."). In fact, the USPTO's Trademark Manual of Examining Procedure has an entire section devoted to examples of various repeating pattern marks. TMEP 1202.19(k).
Whether a repeating pattern actually functions as a trademark or is ornamental or decorative depends on the type of pattern, how it is used, industry practice, and several other factors. When determining whether a repeating pattern functions as a trademark or is merely ornamental/decorative matter, the USPTO will consider a variety of factors, including:
- Whether the pattern is common or widely used (TMEP 1202.19(e)(i)(A));
- Whether the pattern creates a commercial impression distinct from any wording or other matter that appears on the relevant goods (TMEP 1202.19(e)(i)(B));
- The nature of the repeating pattern, including whether it contains any arbitrary wording (TMEP 1202.19(e)(i)(C));
- The industry practice and whether it is common in the industry to use repeated patterns in an ornamental/decorative manner or as trademarks (TMEP 1202.19(e)(i)(D));
- Whether consumers are used to seeing repeating patterns on the type of product, such that they either view them as ornamental/decorative features or as trademarks (for example, repeating patterns are commonly used on items like clothing, furniture, and pillows, so it would be difficult to argue a pattern is functioning as a trademark when used on those goods) (TMEP 1202.19(e)(i)(E)).
If a repeating pattern mark is inherently distinctive, the USPTO will register it on the Principal Register. However, if the repeating pattern is more common, basic, and/or decorative, the USPTO will refuse to register it as a trademark. If the pattern is capable of functioning as a trademark after obtaining acquired distinctiveness in the marketplace, the USPTO may register it on the Supplemental Register.
According to my quick search, MegaPhase does not own any U.S. trademark registrations for a coaxial cable pattern. However, it did obtain a registration back in 2010 for "the color red-orange, Pantone warm red C, as applied to the entirety of the surface and length of a cable." However, that registration is on the Supplemental Register because color marks can never be inherently distinctive (see TMEP 1202.05(a)) and MegaPhase did not attempt to argue that its use of this color on coaxial cables had acquired distinctiveness such that registration on the Principal Register was proper.