Document Type and Number:
Japanese Patent JPS50115027
Kind Code:
U
Application Number:
JP2471974U
Publication Date:
September 19, 1975
Filing Date:
March 04, 1974
Export Citation:
International Classes:
G03B1/02; G03B1/04; G03B17/28; G03B17/30; (IPC1-7): G03B17/30