4. E - Fixed Constructions
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  6. B
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Roller cutter with a tilted journal

E - Fixed Constructions – 21 – B
Patent

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Roller drill bit having radial-thrust pilot bushing...

E - Fixed Constructions – 21 – B
Patent

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Roller reamer stabilizer

E - Fixed Constructions – 21 – B
Patent

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Roller separator for bit bearings

E - Fixed Constructions – 21 – B
Patent

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Roller stabilizer

E - Fixed Constructions – 21 – B
Patent

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Roller sub

E - Fixed Constructions – 21 – B
Patent

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Roller type orbiting mass oscillator with low fluid drag

E - Fixed Constructions – 21 – B
Patent

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Roller-bit with tapered cutting rolls

E - Fixed Constructions – 21 – B
Patent

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Roller-reamer

E - Fixed Constructions – 21 – B
Patent

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Rollers for tubing injectors

E - Fixed Constructions – 21 – B
Patent

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Rolling cone bit having gage and nestled gage cutter...

E - Fixed Constructions – 21 – B
Patent

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Rolling cone bit with elements fanned along the gage curve

E - Fixed Constructions – 21 – B
Patent

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Rolling cone bit with enhancements in cutter element...

E - Fixed Constructions – 21 – B
Patent

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Rolling cone bit with gage and off-gage cutter elements...

E - Fixed Constructions – 21 – B
Patent

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Rolling cone drill bit having cutter elements positioned in...

E - Fixed Constructions – 21 – B
Patent

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Rolling cone drill bit having non-circumferentially arranged...

E - Fixed Constructions – 21 – B
Patent

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Rolling cone drill bit having non-uniform legs

E - Fixed Constructions – 21 – B
Patent

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Rolling cone steel tooth bit with enhancements in cutter...

E - Fixed Constructions – 21 – B
Patent

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Rolling cutter

E - Fixed Constructions – 21 – B
Patent

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Rolling cutter

E - Fixed Constructions – 21 – B
Patent

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