RJ

Ray Johns

ES Exploration & Production Services (North Sea): 3 patents #2 of 4Top 50%
Overall (All Time): #1,657,087 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5259456 Drill stem test tools Jeffrey Charles Edwards, Robert D. Buchanan 1993-11-09
5222559 Valves Jeffrey Charles Edwards, Robert D. Buchanan 1993-06-29
5193619 Well control apparatus Jeffrey Charles Edwards, Robert D. Buchanan 1993-03-16