Self-Defense Fashion From The U.S. Patent Office
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9. Self-Defense Ring Apparatus US Patent # 6,135,321 (2000)
Not only did the inventor of this ring make it big enough to double as a brass knuckle, it can also shoot dangerous liquids like snake venom, cat urine or Smirnoff Ice into the face of an attacker. Wear it on your ring finger to avoid getting hit on at a bar.
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