Document Type and Number:
Japanese Patent JPS52151732
Kind Code:
U
Application Number:
JP6018476U
Publication Date:
November 17, 1977
Filing Date:
May 14, 1976
Export Citation:
International Classes:
G03B7/10; G03B19/18; (IPC1-7): G03B7/00; G03B7/08
Domestic Patent References:
| JP52133637B | ||||
| JPS4812734A | ||||
| JPS5122436A | 1976-02-23 |