SN

Shigeo Nagasaku

SI Sumitomo Metal Industries: 15 patents #9 of 1,462Top 1%
VF Vallourec Mannesmann Oil & Gas France: 11 patents #4 of 81Top 5%
NM Nippon Steel & Sumitomo Metal: 4 patents #273 of 1,491Top 20%
DT Drilltec Patents & Technologies: 1 patents #15 of 19Top 80%
VI Vallourec Industries: 1 patents #1 of 8Top 15%
VF Vallourec Oil And Gas France: 1 patents #75 of 144Top 55%
Overall (All Time): #239,241 of 4,157,543Top 6%
19
Patents All Time

Issued Patents All Time

Showing 1–19 of 19 patents

Patent #TitleCo-InventorsDate
9829127 Threaded joint for steel pipes Masaaki Sugino 2017-11-28
8857857 Threaded joint for steel pipes Kunio Goto, Shigeo Onishi, Hiroaki Ikegami 2014-10-14
8800381 Test apparatus for a threaded joint for oil country tubular goods Chiaki Akamatsu, Yasuhiro Yamamoto 2014-08-12
8622091 Protector for tubular threaded joint Yasuhiro Yamamoto, David W. Clem 2014-01-07
8276946 Threaded joint for steel tubes Masanari Kimoto, Kunio Goto, Masaru Takahashi, Kunihiro Fukui, Ryuichi Imai +2 more 2012-10-02
8113055 Method for evaluating fastening state of threaded joint of pipes or tubes and method for fastening threaded joint of pipes or tubes using the method Ikuji Hoshino, Masaki Yamano 2012-02-14
8091425 Ultrasonic testing method of threaded joint of pipes or tubes Ikuji Hoshino, Masaki Yamano 2012-01-10
8038179 Threaded joint for steel pipes Takahiro Takano, Masaaki Sugino, Takahiro Hamamoto, Suguru Yamaguchi 2011-10-18
7997627 Threaded joint for steel pipes Masaaki Sugino, Miyuki Yamamoto, Michihiko Iwamoto, Pierre Dutilleul, Gabriel Roussie +1 more 2011-08-16
7740285 Threaded joint for steel pipes Kunio Goto, Shigeo Onishi, Hiroaki Ikegami 2010-06-22
7494159 Threaded joint for steel pipes Masaaki Sugino, Miyuki Yamamoto, Michihiko Iwamoto 2009-02-24
7360798 Threaded joint for steel pipes Keishi Matsumoto, Kunio Goto, Toshiro Anraku, Hideo Yamamoto 2008-04-22
6869111 Lubricating coating composition suitable for lubrication of a threaded joint Kunio Goto, Hideo Yamamoto 2005-03-22
6755444 Slim-type threaded joint for oil well pipes Katsutoshi Sumitani, Jun Maeda 2004-06-29
6698802 Pipe joint Jun Maeda, Katsutoshi Sumitani 2004-03-02
6659509 Threaded joint for steel pipes Kunio Goto, Keishi Matsumoto, Kazuyuki Nakasuji, Toshiro Anraku 2003-12-09
5649725 Thread joint for tube Kenichi Ohyabu, Jun Maeda, Akira Narita 1997-07-22
5419595 Threaded joint for oil well pipes Miyuki Yamamoto 1995-05-30
5137310 Assembly arrangement using frustoconical screwthreads for tubes Thierry Noel 1992-08-11