Inventor
KITANO MASAYASU
JP3 patents
Patents
3 patentsUS4721159AJan 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
US4770257ASep 13, 1988
Method of preventing loss of drilling mud during boring a hole in the ground
TAKENAKA KOMUTEN CO4 citations54