Membership
Tour
Register
Log in
Thomas L. Pettigrew
Follow
Person
College Station, TX, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Force balanced rotating pressure control device
Patent number
8,028,750
Issue date
Oct 4, 2011
Sunstone Corporation
William James Hughes
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Grant
Force balanced rotating pressure control device
Patent number
7,743,823
Issue date
Jun 29, 2010
Sunstone Technologies, LLC
William James Hughes
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Patents Applications
last 30 patents
Information
Patent Application
Force Balanced Rotating Pressure Control Device
Publication number
20100200213
Publication date
Aug 12, 2010
SUNSTONE CORPORATION
William James Hughes
E21 - EARTH DRILLING MINING
Information
Patent Application
Force Balanced Rotating Pressure Control Device
Publication number
20080296016
Publication date
Dec 4, 2008
William James Hughes
E21 - EARTH DRILLING MINING