Document Type and Number:
Japanese Patent JPS5445551
Kind Code:
U
Application Number:
JP11849377U
Publication Date:
March 29, 1979
Filing Date:
September 05, 1977
Export Citation:
International Classes:
G03B3/02; G02B7/28; G03B3/00; G03B13/32; G03B31/00; (IPC1-7): G03B31/00; G03B3/00
Domestic Patent References:
| JPS4943638A | 1974-04-24 |