Document Type and Number:
Japanese Patent JPH0130967
Kind Code:
B2
Inventors:
ONOE TERUTAKA
WATANABE RIICHI
WATANABE RIICHI
Application Number:
JP17047381A
Publication Date:
June 22, 1989
Filing Date:
October 23, 1981
Export Citation:
Assignee:
OSAKA GAS CO LTD
International Classes:
E01C3/00; E01C19/10; E01C23/00
Next Patent: JPH0130968