Document Type and Number:
Japanese Patent JPS50134642
Kind Code:
A
Application Number:
JP4127574A
Publication Date:
October 24, 1975
Filing Date:
April 10, 1974
Export Citation:
International Classes:
G03B17/00; G03B1/00; G03B31/00; G03B31/04; (IPC1-7): G03B1/00; G03B31/00; G03B31/04