Mark S. Keys

DI Dowell Schlumberger Incorporated: 1 patents #44 of 148Top 30%

HS Hydrochem Industrial Services: 1 patents #4 of 8Top 50%

📍 Missouri City, TX: #456 of 1,012 inventorsTop 50%

🗺 Texas: #52,441 of 125,132 inventorsTop 45%

Overall (All Time): #2,287,088 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5419183	Methods and apparatus using a hydrocarbon gel to isolate mainline valves in a pipeline during a hydrotest	—	1995-05-30
5197324	Methods and apparatus using a gel to isolate mainline valves in a pipeline during a hydrotest	—	1993-03-30