4. H - Electricity
  5. 04
  6. M

Franklin Hargrave

H - Electricity – 04 – M

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Details

Inventor

Country: United States Of America

Communication switching system

H - Electricity – 04 – Q
Patent

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Information transport system

H - Electricity – 04 – M
Patent

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Multiparty line adaptor with privacy feature

H - Electricity – 04 – M
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Telephone line access system for main distribution frame

H - Electricity – 04 – Q
Patent

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Profile ID: LFCA-PAI-P-1154820

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