Document Type and Number:
Japanese Patent JPS4727841
Kind Code:
U
Application Number:
JP3366072U
Publication Date:
November 29, 1972
Filing Date:
March 23, 1972
Export Citation:
International Classes:
G03B7/16; G03B15/02; G03B15/03; G03B15/04; (IPC1-7): G03B7/08; G03B15/04
Domestic Patent References:
| JPS4331740Y1 | 1968-12-23 |