Terry R. Matthias

CL Camco International (Uk) Limited: 7 patents #4 of 34Top 15%

CL Camco Drilling Group Limited: 5 patents #4 of 27Top 15%

NI Nl Industries: 3 patents #27 of 213Top 15%

CH Camco Drilling Group Limited Of Hycalog: 2 patents #4 of 15Top 30%

NL Nov Downhole Eurasia Limited: 2 patents #6 of 25Top 25%

RL Reed Tool Company Limited: 1 patents #19 of 34Top 60%

CI Camco International: 1 patents #60 of 166Top 40%

GP Grant Prideco: 1 patents #22 of 58Top 40%

NV National Oilwell Varco: 1 patents #240 of 551Top 45%

NL Nl Petroleum Products Limited: 1 patents #7 of 9Top 80%

📍 Painswick, GB: #1 of 5 inventorsTop 20%

Overall (All Time): #154,772 of 4,157,543Top 4%

Patents All Time

Issued Patents All Time

Showing 26–26 of 26 patents

Patent #	Title	Co-Inventors	Date
4570725	Drill bit cutter	John D. Barr	1986-02-18