Membership
Tour
Register
Log in
Charles H.S. Douglas, III
Follow
Person
Flint, TX, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Fixed cutter bit with backup cutter elements on primary blades
Patent number
7,703,557
Issue date
Apr 27, 2010
Smith International, Inc.
Bala Durairajan
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
DRAG BIT WITH UTILITY BLADES
Publication number
20110253457
Publication date
Oct 20, 2011
Smith International, Inc.
Yuelin Shen
E21 - EARTH DRILLING MINING
Information
Patent Application
Fixed Cutter Bit With Backup Cutter Elements on Primary Blades
Publication number
20080302575
Publication date
Dec 11, 2008
Smith International, Inc.
Bala Durairajan
E21 - EARTH DRILLING MINING