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Padlock Patent — Keyed

Patent 3979931

Inventor: Tsui Wai Man

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Patent # 3979931
Issue Date 1975-05-08
Inventor Tsui Wai Man
Type Keyed

Patent Drawings

Patent 3979931 drawing 1 Drawing 1 Patent 3979931 drawing 2 Drawing 2 Patent 3979931 drawing 3 Drawing 3

Patent Details

Patent Number 3979931
Issue Date 1975-05-08
Inventor Tsui Wai Man
Patent Type Keyed
External Link https://patents.google.com/patent/US3979931/en ↗
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