4. Boring or penetrating the earth
  5. Below-ground impact members
  6. Fluid-operated

Edwin J. Spangler, Jr.

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Mechano-hydraulic double-acting drilling jar

Boring or penetrating the earth – Below-ground impact members – Fluid-operated
Patent

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Method and apparatus for preventing cross-examination of biochem

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving viable micro-organism
Patent

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Profile ID: LFUS-PAI-P-1461943

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