Document Type and Number:
Japanese Patent JPS6373716
Kind Code:
U
Application Number:
JP16570786U
Publication Date:
May 17, 1988
Filing Date:
October 30, 1986
Export Citation:
International Classes:
G02C3/04; (IPC1-7): G02C3/04
Domestic Patent References:
| JPS5730728B2 | 1982-06-30 | |||
| JPS5128330B1 | 1976-08-18 |