4. E - Fixed Constructions
  5. 21
  6. B

Joseph L. Jr. Kelly

E - Fixed Constructions – 21 – B

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Country: United States Of America

Air groove scraper

E - Fixed Constructions – 21 – B
Patent

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Non-rotating stabilizer for drill string

E - Fixed Constructions – 21 – B
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Solid head bit with tungsten carbide central core

E - Fixed Constructions – 21 – B
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Surface acoustic wave pipe identification system

G - Physics – 01 – V
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Profile ID: LFCA-PAI-P-1048083

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