Document Type and Number:
Japanese Patent JPH0181693
Kind Code:
U
Application Number:
JP17746687U
Publication Date:
May 31, 1989
Filing Date:
November 20, 1987
Export Citation:
International Classes:
G09F17/00; E01F13/00; G09F13/20; (IPC1-7): G09F17/00; E01F13/00; G09F13/20
Domestic Patent References:
| JP57063389B | ||||
| JPS5818288B2 | 1983-04-12 |
Next Patent: JPH0181694