Document Type and Number:
Japanese Patent JPH057517
Kind Code:
B2
Inventors:
OCHI NAGATOMO
Application Number:
JP17235788A
Publication Date:
January 28, 1993
Filing Date:
July 11, 1988
Export Citation:
Assignee:
TOKKI KOGYO KK
International Classes:
E21B10/44; E02D17/13; E02F5/02; E21B15/00
Next Patent: FLOWMETER