4. C - Chemistry, Metallurgy
  5. 22
  6. B

Gold and silver extraction

C - Chemistry – Metallurgy – 22 – B

Patent

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Details

53/230

C22B 11/08 (2006.01)

Patent

CA 360747

Godard John S.

C - Chemistry – Metallurgy – 22 – B
Inventor

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Hall Wilfred N.

C - Chemistry – Metallurgy – 22 – B
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Read Barclay K.

C - Chemistry – Metallurgy – 22 – B
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Na

G - Physics – 21 – G
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The Canadian Industries Limited

B - Operations – Transporting – 29 – D
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