Login| Sign Up| Help| Contact|

Patent Searching and Data


Document Type and Number:
Japanese Patent JPH0325646
Kind Code:
U
Application Number:
JP8563789U
Publication Date:
March 15, 1991
Filing Date:
July 24, 1989
Export Citation:
Click for automatic bibliography generation   Help
International Classes:
E02F9/00; E21B1/00; (IPC1-7): E02F9/00; E21B1/00
Domestic Patent References:
JPS6114794U1986-01-28
JP60153777B



 
Next Patent: JPH0325647