LandOfFree - US Patents - Listing for Pipe joints or couplings,With assembly means or feature

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Dickinson Alan J.

Inventor

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Dinnes Calum J. B.

Inventor

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Do Tai H.

Inventor

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Dolberg, Esq David

Attorney

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Domas Dennis R.

Inventor

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Dönch Matthias

Inventor

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Donovan George J.

Inventor

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Dopyera Emil E.

Inventor

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Dornbracht Helmut

Inventor

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Dougherty Michael L.

Inventor

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Dover Capital Formation Corporation

Corporate Assignee

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Driggers Gwendolyn

Examiner

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Drill Systems International Ltd.

Corporate Assignee

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Drill-Quip, Inc.

Corporate Assignee

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Driver Gary R.

Inventor

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Duncan Anthony B.

Inventor

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Dunlap, Codding & Rogers, Inc.

Law Firm

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Dunwoody Aaron

Examiner

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