Document Type and Number:
Japanese Patent JPS4727937
Kind Code:
U
Application Number:
JP3023371U
Publication Date:
November 29, 1972
Filing Date:
April 19, 1971
Export Citation:
International Classes:
G03B11/04; (IPC1-7): G03B11/04
Domestic Patent References:
| JPS3418159Y1 |