Welding helmet visor

Assignee

• 3M

Inventors

• David Crafoord (26 patents)
• Rutger Belin (8 patents)
• Lennart C. Fredriksson (8 patents)
• Jonas Fridholm (17 patents)
• Oskar Juhlin (85 patents)
• Niklas Lilenthal (18 patents)
• Kjell I. Mases (10 patents)

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