Document Type and Number:
Japanese Patent JPH03129645
Kind Code:
U
Application Number:
JP3985090U
Publication Date:
December 26, 1991
Filing Date:
April 13, 1990
Export Citation:
International Classes:
E04F21/16; (IPC1-7): E04F21/16
Domestic Patent References:
| JPS425256Y1 | 1967-03-16 | |||
| JP53151622B |