Document Type and Number:
Japanese Patent JPS5157137
Kind Code:
U
Application Number:
JP13047574U
Publication Date:
May 06, 1976
Filing Date:
October 30, 1974
Export Citation:
International Classes:
G03B21/64; (IPC1-7): G03B21/64
Domestic Patent References:
| JPS341580Y1 | ||||
| JP34001580A |