4. H - Electricity
  5. 01
  6. H

Irving A. Speelman

H - Electricity – 01 – H

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Battery-recharging device with indicating lamp

H - Electricity – 02 – J
Patent

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Disposable valve

F - Mech Eng,Light,Heat,Weapons – 16 – K
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Endoscope

A - Human Necessities – 61 – B
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Microscope slide construction

G - Physics – 02 – B
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One-piece binaural assemblies for stethoscopes

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Profile ID: LFCA-PAI-P-159595

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