Invention: blue jeans

Definition: noun / waist overalls, jeans, Levi's® jeans
Function: Clothes, especially pants, that are usually close-fitting and created from the rugged cotton twill textile that is colored blue with indigo dye
Patent: 139,121 (US) issued May 20, 1873 for Fastening Pocket-Openings

Inventor: Jacob Davis (aka Jacob Youphes)

Criteria: First to invent. First to patent. First practical.
Birth: 1834 in Riga Latvia
Death: 1908 in San Francisco, California
Nationality: German

Inventor: Levi Strauss (aka Loeb Strauss)

Criteria: First to patent. First practical. Entrepreneur.
Birth: February 26, 1829 in Buttenheim, Germany
Death: September 27, 1902 in San Francisco, California
Nationality: American (of German decent)