4. A - Human Necessities
  5. 62
  6. B

Lens retainer

A - Human Necessities – 62 – B

Patent

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Details

88/109, 2/42

A62B 18/02 (2006.01)

Patent

CA 622965

Holzwarth Henry A.

B - Operations – Transporting – 42 – F
Inventor

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Wark John D.

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Wetherell Joseph J.

A - Human Necessities – 62 – B
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Mine Safety Appliances Company

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G - Physics – 21 – G
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