Document Type and Number:
Japanese Patent JPS4925435
Kind Code:
U
Application Number:
JP6488972U
Publication Date:
March 04, 1974
Filing Date:
June 01, 1972
Export Citation:
International Classes:
G03B17/12; G02B27/18; G03B17/56; (IPC1-7): G02B27/18; G03B17/12; G03B17/56
Domestic Patent References:
| JPS427413Y1 | 1967-04-10 |