Inventor

OHSHITA TOSHIYUKI

JP2 patents

Patents

2 patents

US4721159AJan 26, 1988

Method and device for conveying chemicals through borehole

TAKENAKA KOMUTEN CO89 citations91

US4706753ANov 17, 1987

Method and device for conveying chemicals through borehole

TAKENAKA KOMUTEN CO68 citations91