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The 3-point seat belt was invented in 1959 by Nils Bohlin, a Swedish engineer working for Volvo. Before this, cars mainly used 2-point lap belts, which offered limited protection and often caused injuries to the upper body during crashes.

Bohlin designed the 3-point belt to secure both the upper and lower body, spreading crash forces across the chest, pelvis, and shoulders—stronger parts of the human body. Volvo first introduced it in the Volvo PV544 and Amazon models.

In a landmark move, Volvo made the patent free for all manufacturers, prioritizing public safety over profit. This decision is credited with saving millions of lives worldwide and led to the 3-point seat belt becoming a global standard in automobiles.