4. C - Chemistry, Metallurgy
  5. 10
  6. L

Audio response apparatus

C - Chemistry – Metallurgy – 10 – L

Patent

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Details

354/47

C10L 1/00 (2006.01) H04M 11/00 (2006.01)

Patent

CA 912165

Itakura Fumitada

G - Physics – 10 – L
Inventor

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Koike Tsunehiko

C - Chemistry – Metallurgy – 10 – L
Inventor

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Nishikawa Masaaki

C - Chemistry – Metallurgy – 10 – L
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Saito Shuzo

H - Electricity – 04 – J
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Nippon Telegraph And Telephone Public Corporation

H - Electricity – 04 – N
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