4. G - Physics
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Donald H. Ward

G - Physics – 01 – N

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Automated drill pipe handling system

E - Fixed Constructions – 21 – B
Patent

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Automated drill pipe handling system

E - Fixed Constructions – 21 – B
Patent

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Breath tester null memory system

G - Physics – 01 – N
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Breath tester null memory system

G - Physics – 01 – D
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Computor-controlled oil drilling rig having drawworks motor...

E - Fixed Constructions – 21 – B
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Fail-resistant solid state interruption system

H - Electricity – 02 – H
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Profile ID: LFCA-PAI-P-15369

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