The buttons on jeans
Actually, these are not buttons at all; these are known as rivets, and are placed in specific points of the jeans so that it does not wear out and lasts longer. This practice became common in 1829 because miners were constantly reporting that the jeans they wore were not durable enough.
By then, it was a great improvement, which added stability to the fabric and made it more resistant. Although today they are not so necessary, they are still used both to give more quality to the garment, as well as to continue providing rigidity to the fabric of those jeans that are specifically used for work.
The patent belongs to Levi Strauss, and he had the idea in 1829.