Inventor
MORIOKA MASAKAZU
JP2 patents
Patents
2 patentsUS4449098AMay 15, 1984
Arrangement for detecting the location of an electrically insulative continuous item positioned underground
OSAKA GAS CO LTD43 citations88
US4573016AFeb 25, 1986
Method and arrangement for enabling the detection of the location of a horizontally arranged gas conveying passage positioned underground
OSAKA GAS CO LTD13 citations69