Document Type and Number:
Japanese Patent JPS5021552
Kind Code:
U
Application Number:
JP7335273U
Publication Date:
March 11, 1975
Filing Date:
June 20, 1973
Export Citation:
International Classes:
G03B31/04; G03B31/00; H03K3/02; (IPC1-7): G03B31/00; H03K3/02