Inventor
WATAHIKI SEISHI
JP7 patents
Patents
7 patentsUS4770105ASep 13, 1988
Piping travelling apparatus
HITACHI LTD78 citations95
US4037890AJul 26, 1977
Vertical type antifriction bearing device
HITACHI LTD71 citations93
US5640462AJun 17, 1997
Imaging method of X-ray computerized tomography and apparatus for X-ray computerized tomography
HITACHI LTD23 citations92
US4918283AApr 17, 1990
Method of and apparatus for conducting plasma welding
HITACHI LTD31 citations91
US4644791AFeb 24, 1987
Moving apparatus for a hollow curved pipe-arrangement and an operating method in the pipe-arrangement by using the moving apparatus
HITACHI LTD20 citations80
US4788409ANov 29, 1988
Method of and apparatus for automatically conducting all position plasma welding of pipes
HITACHI LTD11 citations72
US4915349AApr 10, 1990
Gas governor apparatus and gas piping system
HITACHI LTD7 citations71