GP

Gary R. Portwood

SI Smith International: 50 patents #10 of 708Top 2%
Schlumberger Technology: 4 patents #1,558 of 7,293Top 25%
📍 Saline, TX: #1 of 1 inventorsTop 100%
Overall (All Time): #45,617 of 4,157,543Top 2%
55
Patents All Time

Issued Patents All Time

Showing 51–55 of 55 patents

Patent #TitleCo-InventorsDate
5394952 Core cutting rock bit Roger Johns, Gilbert S. Tyner, Charles R. Muren 1995-03-07
5362073 Composite seal for rotary cone rock bits Robert G. Upton, Michael F. Hooper, Jerry Pyka, Randy Johnston, Robert X. Chambers 1994-11-08
5351770 Ultra hard insert cutters for heel row rotary cone rock bit applications Chris E. Cawthorne, Scott D. McDonough, Michael A. Siracki 1994-10-04
5341890 Ultra hard insert cutters for heel row rotary cone rock bit applications Chris E. Cawthorne, Michael A. Siracki 1994-08-30
5172779 Radial crest insert Michael A. Siracki, Chris E. Cawthorne, James C. Minikus 1992-12-22