1. Threaded and Coupled Connection for Improved Fatigue Resistance;DeLange,2003
2. Threaded Tubular Element for Fatigue Resistant Threaded Tubular Joint and Resulting Threaded Tubular Joint, 6729658;Verdillon,2004
3. Threaded Connection for Enhanced Fatigue Resistance;DeLange,1999
4. String of Drill Pipes for Rotary Percussion Drilling, Especially for Simultaneous Drilling;Flemming,2004