Document Type and Number:
Japanese Patent JPS4856136
Kind Code:
A
Application Number:
JP9098571A
Publication Date:
August 07, 1973
Filing Date:
November 13, 1971
Export Citation:
International Classes:
G03B19/18; G03B31/00; G03B31/02; (IPC1-7): G03B31/02
Domestic Patent References:
| JPS4028612Y1 | 1965-10-11 |