Clothing history: In which year were blue jeans (riveted denim trousers) invented? Context: Levi Strauss and Jacob Davis received the U.S. patent for riveted pockets. Choose the correct year.

ReasoningLevi Strauss and tailor Jacob Davis received U.S. Patent No. 139,121 on May 20, 1873 for rivet-reinforced denim trousers — the birth of blue jeans.

Common pitfalls

• Choosing 1853 (Levi Strauss arrived in San Francisco) or 1886 (later branding milestones).

Final Answer1873.