Howard Ervin

Follow

Person

Spring, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Clamp apparatus for threadedly connected tubulars
- Patent number 8,448,320
- Issue date May 28, 2013
- Varco I/P, Inc.
- Ronald W. Yater
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Clamp apparatus for threadedly connected tubulars
- Patent number 7,784,834
- Issue date Aug 31, 2010
- Varco I/P, Inc.
- Ronald W. Yater
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Top drives with shaft multi-seal
- Patent number 7,748,473
- Issue date Jul 6, 2010
- National-Oilwell Varco, L.P.
- Lawrence E. Wells
- E21 - EARTH DRILLING MINING
Information Patent Grant
Multi-seal for top drive shaft
- Patent number 7,487,848
- Issue date Feb 10, 2009
- Varco I/P, Inc.
- Larry Wells
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Clamp Apparatus for Threadedly Connected Tubulars
- Publication number 20100283241
- Publication date Nov 11, 2010
- Varco I/P, Inc.
- Ronald W. Yater
- E21 - EARTH DRILLING MINING
Information Patent Application
Top drives with shaft multi-seal
- Publication number 20090044982
- Publication date Feb 19, 2009
- Lawrence E. Wells
- E21 - EARTH DRILLING MINING
Information Patent Application
Clamp apparatus for threadedly connected tubulars
- Publication number 20080238095
- Publication date Oct 2, 2008
- Ronald W. Yater
- E21 - EARTH DRILLING MINING
Information Patent Application
Multi-seal for top drive shaft
- Publication number 20070251705
- Publication date Nov 1, 2007
- Lawrence E. Wells
- E21 - EARTH DRILLING MINING