Inventor
NAGASAKU SHIGEO
JP19 patents
⚠️ This page may combine multiple inventors who share the name “NAGASAKU SHIGEO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUMITOMO METAL IND
11 patentsUS6659509B2Dec 9, 2003
Threaded joint for steel pipes
SUMITOMO METAL IND61 citations95
US5419595AMay 30, 1995
Threaded joint for oil well pipes
SUMITOMO METAL IND92 citations95
US7494159B2Feb 24, 2009
Threaded joint for steel pipes
SUMITOMO METAL IND28 citations92
US7360798B2Apr 22, 2008
Threaded joint for steel pipes
SUMITOMO METAL IND30 citations92
US6869111B2Mar 22, 2005
Lubricating coating composition suitable for lubrication of a threaded joint
SUMITOMO METAL IND44 citations92
US5649725AJul 22, 1997
Thread joint for tube
SUMITOMO METAL IND42 citations89
US8038179B2Oct 18, 2011
Threaded joint for steel pipes
SUMITOMO METAL IND13 citations83
US7740285B2Jun 22, 2010
Threaded joint for steel pipes
SUMITOMO METAL IND5 citations63
US7997627B2Aug 16, 2011
Threaded joint for steel pipes
SUMITOMO METAL IND5 citations61
US6755444B2Jun 29, 2004
Slim-type threaded joint for oil well pipes
SUMITOMO METAL IND4 citations61
US6698802B2Mar 2, 2004
Pipe joint
SUMITOMO METAL IND6 citations61
HOSHINO IKUJI
2 patentsUS8113055B2Feb 14, 2012
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
HOSHINO IKUJI2 citations57
US8091425B2Jan 10, 2012
Ultrasonic testing method of threaded joint of pipes or tubes
HOSHINO IKUJI3 citations57