4. D - Textiles, Paper
  5. 04
  6. H

Yoshio Shinagawa

D - Textiles – Paper – 04 – H

Inventor

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Details

Inventor

Country: Japan

Electret filters

B - Operations – Transporting – 01 – D
Patent

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Method for producing electret filter

C - Chemistry – Metallurgy – 08 – J
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Process for producing an electret, a film electret, and an...

H - Electricity – 01 – G
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Processes for preparing electret filters

D - Textiles – Paper – 04 – H
Patent

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Profile ID: LFCA-PAI-P-1188065

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