Inventor

KOLTERMANN TERRY

US3 patents

Patents

3 patents

US7311159B2Dec 25, 2007

PCD face seal for earth-boring bit

BAKER HUGHES INC50 citations95

US7128173B2Oct 31, 2006

PCD face seal for earth-boring bit

BAKER HUGHES INC46 citations95

US6684966B2Feb 3, 2004

PCD face seal for earth-boring bit

BAKER HUGHES INC53 citations95