Document Type and Number:
Japanese Patent JPS53164149
Kind Code:
U
More Like This:
Application Number:
JP6953877U
Publication Date:
December 22, 1978
Filing Date:
May 30, 1977
Export Citation:
International Classes:
G03B17/18; (IPC1-7): G03B17/18
Domestic Patent References:
JPS4023822Y1 | 1965-08-13 | |||
JP51073035B |