4. H - Electricity
  5. 04
  6. N

David A. Ruston

H - Electricity – 04 – N

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A socket structure of current-rectifiable lamp string

H - Electricity – 01 – R
Patent

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Air compressor

F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent

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Anti-skidding structure of automobile foot mat

B - Operations – Transporting – 60 – N
Patent

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Assembly structure of rigid body and elastic body

F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent

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Automatically-collapsible multi-folded umbrella

A - Human Necessities – 45 – B
Patent

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Profile ID: LFCA-PAI-P-1266058

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