Document Type and Number:
Japanese Patent JPS5251628
Kind Code:
U
Application Number:
JP13934175U
Publication Date:
April 13, 1977
Filing Date:
October 13, 1975
Export Citation:
International Classes:
G03B31/00; G03B21/43; (IPC1-7): G03B31/00; G03B21/43
Domestic Patent References:
| JP46025816U | ||||
| JPS4736425A |