Document Type and Number:
Japanese Patent JPS56164218
Kind Code:
U
Application Number:
JP6475580U
Publication Date:
December 05, 1981
Filing Date:
May 12, 1980
Export Citation:
International Classes:
G02C7/16; A61F11/14; G02C3/02; G02C5/12; (IPC1-7): G02C7/16; A41D21/00