Document Type and Number:
Japanese Patent JPS50145135
Kind Code:
A
Application Number:
JP5198974A
Publication Date:
November 21, 1975
Filing Date:
May 10, 1974
Export Citation:
International Classes:
G03B31/00; G03B31/02; (IPC1-7): G03B31/02
Domestic Patent References:
| JPS434407Y1 | 1968-02-26 | |||
| JP41015910A |