Inventor
HOSOHARA YASUHARU
JP6 patents
Patents
6 patentsUS5623203AApr 22, 1997
Remote field flaw sensor including an energizing coil, first and second receiving coil groups oriented perpendicular and a third receiving coil oriented parallel to pipe
TOKYO GAS CO LTD91 citations94
US5773984AJun 30, 1998
Method of inspecting abnormality occurring inside pipe and apparatus for practicing the method
TOKYO GAS CO LTD46 citations89
US5461312AOct 24, 1995
Remote field eddy current sensor for detecting flaws in metal material
TOKYO GAS CO LTD17 citations80
US5365169ANov 15, 1994
Remote field eddy current flaw detector for metal material including attenuator, adder, phase shiftery and phase comparator
TOKYO GAS CO LTD14 citations80
US5210492AMay 11, 1993
Remote field eddy current flaw detector for metal pipes having a pair of receiver coils providing a differential offset amplitude signal
TOKYO GAS CO LTD18 citations80
US5612625AMar 18, 1997
Method of measuring inner diameter of pipe
TOKYO GAS CO LTD8 citations70