Document Type and Number:
Japanese Patent JPS50119336
Kind Code:
U
Application Number:
JP2828874U
Publication Date:
September 29, 1975
Filing Date:
March 13, 1974
Export Citation:
International Classes:
G03B7/20; G03B7/02; G03B9/02; G03B19/12; (IPC1-7): G03B9/02
Domestic Patent References:
| JPS421971Y1 | 1967-02-06 | |||
| JPS4818569U | 1973-03-02 | |||
| JPS48102289U | 1973-11-30 |