When Two Letters Weren’t Enough

Picture the late 1800s: cotton sheeting was a staple product, and manufacturers needed a quick way to tell buyers what kind of quality or weight they were getting. Lawrence Manufacturing Company started stamping “LL” on its cotton sheeting, which meant four yards of fabric per pound. Over time, though, other companies—including Tennessee Manufacturing Company—started using the same “LL” stamp. Lawrence tried to pull rank, saying “Hey, that’s our trademark!” and sued for infringement. The case made its way to the Supreme Court, which had to answer a simple but important question: was “LL” actually a trademark, or just a shorthand for quality?

The Trademark Test

Here’s the thing about trademarks: they’re meant to tell you where a product comes from—not just how good it is. If you see a swoosh on sneakers, you know they’re Nikes, not just a certain grade of running shoe. A real trademark connects a product to its source so customers don’t get duped into buying from someone else.

But the Court found that the “LL” stamp didn’t do that job. Instead, it had become an industry-wide shorthand for a grade of cotton sheeting—four yards to a pound. The mark wasn’t telling you “this fabric came from Lawrence Manufacturing”; it was telling you “this fabric meets this quality standard.” And since multiple companies used it that way for years, the letters couldn’t suddenly transform into Lawrence’s exclusive trademark.

This image was created with Freepik.ai.

This image was created with OpenArt.ai.

The Supreme Court’s Ruling

The Court said, flat out: the “LL” stamp isn’t a trademark. Why? Because it was never really about identifying the maker. It was just about telling the buyer what they were getting in terms of quality. Even if the mark had been considered a trademark at some point, industry practice had shifted so much that “LL” was really just a grading symbol by the time of the lawsuit.

And here’s a kicker: even if it were a trademark, Tennessee’s use still wouldn’t have counted as fraud. Customers weren’t being tricked into thinking they were buying Lawrence’s goods. They were just looking for the right grade of sheeting—and the “LL” stamp delivered that information, no matter who manufactured it.

Why This Matters

This case highlights a key point in trademark law: not every symbol, stamp, or phrase is a trademark. For a mark to count, it has to identify a product’s source, not just its quality. Otherwise, trademarks could be used to monopolize generic industry standards—and that’s not what they’re for.

A Modern Parallel

Think about the labels you see on grocery store shelves: organic, gluten-free, extra-large. None of these are trademarks—they’re descriptors of quality or type. Multiple companies can sell “organic” cereal or “extra-large” T-shirts without stepping on each other’s trademark rights. But if you slap the word “Kellogg’s” on that cereal, that’s a trademark—because it tells you who made it, not just what’s inside.

That’s exactly what the Supreme Court was saying back in 1891: “LL” was more like “extra-large” than “Nike.” It was a signal of grade, not a brand identity.

So next time you see letters or numbers on packaging, remember: sometimes they’re a brand’s signature, but other times they’re just telling you what’s inside. The Supreme Court drew that line in Lawrence v. Tennessee Mfg. Co.—and made sure two simple letters didn’t corner the market.

This image was created with OpenArt.ai.