Document Type and Number:
Japanese Patent JPH02134524
Kind Code:
U
More Like This:
Application Number:
JP4439489U
Publication Date:
November 08, 1990
Filing Date:
April 15, 1989
Export Citation:
International Classes:
G03B17/08; G02B7/02; G03B17/14; (IPC1-7): G03B17/08; G03B17/14
Domestic Patent References:
JPS6017096A | 1985-01-28 | |||
JPS5782324U | 1982-05-21 |