DE

David Ellwood

BS Bio Medic Data Systems: 12 patents #2 of 8Top 25%
MO Marathon Oil: 7 patents #17 of 204Top 9%
Overall (All Time): #241,908 of 4,157,543Top 6%
19
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
7052178 Implantable inductively programmed temperature sensing transponder Donald J. Urbas, Eric B. Weddington 2006-05-30
6900721 Implantable inductively programmed temperature sensing transponder Donald J. Urbas, Eric B. Weddington 2005-05-31
6755250 Gas-liquid separator positionable down hole in a well bore Jared Coleman Hall, James A. Tomlinson 2004-06-29
6054935 System monitoring programmable implantable transponder Donald J. Urbas 2000-04-25
5832999 Method and assembly for igniting a burner assembly 1998-11-10
5767792 Method for calibrating a temperature sensing transponder Donald J. Urbas 1998-06-16
5724030 System monitoring reprogrammable implantable transponder Donald J. Urbas 1998-03-03
5650778 Antenna for programming a transponder Donald J. Urbas 1997-07-22
5532686 Programmable transponder Donald J. Urbas, John Burne 1996-07-02
5488990 Apparatus and method for generating inert gas and heating injected gas Eugene E. Wadleigh, Albert C. Compton 1996-02-06
5481262 System monitoring programmable implanatable transponder Donald J. Urbas 1996-01-02
5450901 Apparatus and process for producing and reinjecting gas 1995-09-19
5422636 System monitoring programmable implantable transponder Donald J. Urbas 1995-06-06
5420579 Antenna and driving circuit for transmitting and receiving signals to and from a passive transponder Donald J. Urbas 1995-05-30
5327971 Pressure recorder carrier and method of use Charles F. Garbutt 1994-07-12
5252962 System monitoring programmable implantable transponder Donald J. Urbas 1993-10-12
5250944 Antenna and driving circuit for transmitting and receiving images to and from a passive transponder Donald J. Urbas 1993-10-05
5133407 Fluid injection and production apparatus and method Timothy A. Deines 1992-07-28
4947936 Well unit dynamometer installation means and method 1990-08-14