Document Type and Number:
Japanese Patent JPH0474481
Kind Code:
B2
Application Number:
JP10430683A
Publication Date:
November 26, 1992
Filing Date:
June 13, 1983
Export Citation:
International Classes:
E01D19/08; E01C3/06; E01C7/18; E01C7/00; E01D101/00
Next Patent: JPH0474482