Nobuo Kobayashi

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Kawasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Galling resistant drill pipe tool joint and corresponding drill pipe
- Patent number 9,970,242
- Issue date May 15, 2018
- Tenaris Connections B.V.
- Tomoyuki Narikawa
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR

Patents Applicationslast 30 patents

Information Patent Application
GALLING RESISTANT DRILL PIPE TOOL JOINT AND CORRESPONDING DRILL PIPE
- Publication number 20150368986
- Publication date Dec 24, 2015
- Tomoyuki Narikawa
- E21 - EARTH DRILLING MINING