Inventor

HOSONO KAZUHO

JP2 patents

Patents

2 patents

US5495237AFeb 27, 1996

Measuring tool for collecting down hole information and metering valve for producing mud-pulse used in the same

AKISHIMA LAB MITSUI ZOSEN INC88 citations88

US5295548AMar 22, 1994

Bottom-hole information collecting equipment

AKISHIMA LAB MITSUI ZOSEN INC20 citations87