Document Type and Number:
Japanese Patent JPS4849186
Kind Code:
A
Application Number:
JP8415571A
Publication Date:
July 11, 1973
Filing Date:
October 23, 1971
Export Citation:
International Classes:
E02B3/20
Domestic Patent References:
| JPS4411333Y1 | 1969-05-10 |
Foreign References:
| US3521588A | 1970-07-21 |