Kenneth J. Hartwein

Follow

Person

New Orleans, LA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Unidirectional filter for hydraulic systems
- Patent number 4,834,177
- Issue date May 30, 1989
- Vetco Gray Inc.
- Charles D. Bridges
- E21 - EARTH DRILLING MINING
Information Patent Grant
Through the tubing perforating gun assembly
- Patent number 4,496,009
- Issue date Jan 29, 1985
- Shell Oil Company
- Raymond W. DerMott
- E21 - EARTH DRILLING MINING