Document Type and Number:
Japanese Patent JPH0185813
Kind Code:
U
Application Number:
JP18149587U
Publication Date:
June 07, 1989
Filing Date:
November 28, 1987
Export Citation:
International Classes:
G02B21/00; B44B11/00; G02B25/00; (IPC1-7): G02B21/00; B44B11/00; G02B25/00
Domestic Patent References:
| JP60094616B | ||||
| JPS5751911B2 | 1982-11-04 |
Next Patent: JPH0185814