Who invented blue jeans? Jacob Davis, Levi Strauss and patent 139,121

Jacob W. Davis, a tailor in Reno, Nevada, invented the riveted work pants that became blue jeans, and he and Levi Strauss & Company were granted U.S. Patent No. 139,121 on May 20, 1873. The patent covers metal rivets at the corners of pocket openings. It does not cover jeans as a garment, and it does not cover denim.

What the patent actually protects

The grant is titled "Improvement in Fastening Pocket-Openings." According to the text on Google Patents, Davis proposed "a metal rivet or eyelet at each edge of the pocket-opening" so as "to bind the two parts of cloth together." The idea was to move the strain off the stitching, which is where work pants tended to tear. The specification also notes that rivets were already used on seams in shoes, and Davis disclaims that use.

So the invention is narrow and mechanical. A rivet at a stress point is what the patent claims, and the National Archives, which holds the later court file, describes it in the same terms: an "improvement in fastening pocket openings." Denim, the cotton twill that jeans are cut from, was already the common fabric for work clothes. The University of Iowa Libraries explain why: it was thick, strong and resistant to tearing.

Why Levi Strauss's name is on it

Davis was the tailor. Strauss was his supplier. The University of Iowa Libraries report that Davis could not afford the $81 filing fee, roughly $2,000 today by their estimate, and turned to Strauss, the businessman he bought denim from. The two became partners, and the patent was issued to Davis as "assignor to himself and Levi Strauss & Company of San Francisco," according to the patent record.

The origin story the libraries tell is practical: a farmer's wife asked Davis for pants that would not wear out quickly, and he added rivets to the most stressed spots. Davis's own account, as given in his deposition and described by the National Archives, dates his first use of rivets on work pants to January 1871, more than two years before the patent.

One line from a letter Davis wrote to Strauss survives in the Iowa account: "The secret of them Pents is the Rivits [sic] that I put in those Pockets." It is the shortest accurate description of the invention we have found.

The lawsuit and the money

Patents are worth what a court will enforce. On January 31, 1874, Davis and Strauss sued A. B. Elfelt and others for infringement, according to the National Archives, claiming damages of $20,000. The court decided for the plaintiffs on February 10, 1875, and awarded $2,000. The archives hold digital copies of several documents from case file 1211, including a page of Davis's deposition, in the records of the U.S. district courts.

That is a win with a haircut: the plaintiffs got a tenth of what they asked. It also shows how early the copying began. Within a year of the patent, a competitor was already selling riveted pants.

The timeline in the records

• January 1871: Davis dates his first use of rivets on work pants, per his deposition.
• May 20, 1873: patent No. 139,121 is granted.
• January 31, 1874: Davis and Strauss file suit against A. B. Elfelt and others.
• February 10, 1875: the court decides for the plaintiffs.

Strauss was born in 1829 in Bavaria and immigrated to the United States at sixteen, the University of Iowa Libraries note. By the time of the patent he was a San Francisco wholesaler, which is how the patent came to carry a firm's name next to a tailor's.

What "invented jeans" gets wrong

Three claims travel together online, and the records support only parts of each.

• "Levi Strauss invented jeans." The patent names Davis as inventor and Strauss and Davis as joint owners. Strauss financed the filing and sold the fabric.
• "The patent was for jeans." It was for rivets at pocket openings. The clothing itself is not claimed.
• "The patent was for blue denim." Denim does not appear as the invention. The patent describes cloth and rivets.

The University of Iowa Libraries add one more detail that matters to the timeline: a patent gave its holder sole use of the invention for 17 years in that era. They say the original Strauss patent has now expired. The patent text we read does not state an expiry year, so we do not give one.

What the rivet tells you today

The idea outlived the patent. Reinforcing the corners of pockets is still how a pair of jeans is built, and a rivet or bar tack at the pocket corner is the feature that links a modern pair to the 1873 design. If you are buying a pair for durability, look at how the pocket corners are finished rather than at the label. For how denim is woven and what the edge of a roll signals, see our explainer on selvedge denim, and for care, how often to wash jeans.

Our take

Credit Davis with the invention and Strauss with the business. The patent document is a better story than the myth: a tailor with an idea and no money, a supplier with both, and a rivet. Skip any account that says the 1873 patent covered jeans or denim. The record says rivets, at the corners of pockets.

We read the patent text on Google Patents, the National Archives account of the court file, and the University of Iowa Libraries' account. We did not see the original claim wording in clean form, because the OCR text of the claim section is incomplete, so we quote only passages that read cleanly.