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Henry Ward Johns

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Inventor of a fireproof material and founder who patented his invention in 1868 and built a large company by 1927.

Videos Mentioning Henry Ward Johns

Asbestos is a bigger problem than we thought

Asbestos is a bigger problem than we thought

Veritasium

Inventor of a fireproof material and founder who patented his invention in 1868 and built a large company by 1927.