Levi Strauss & Co. is a privately held American clothing company founded in 1853 in San Francisco. It is known worldwide for its Levi's brand of denim jeans. In 1873, Levi Strauss and Jacob Davis received a patent for riveted men's work pants made of denim - the first blue jeans. The company remains owned by descendants of Levi Strauss's nephews. Levi's has had success marketing through use of popular music in TV ads. It offers a variety of jean cuts that have contributed to its longevity while many other brands have failed. The company focuses on core values of empathy, originality, integrity and courage in sustaining responsible commercial success.