Document Type and Number:
Japanese Patent JPS5441674
Kind Code:
U
More Like This:
Application Number:
JP11536777U
Publication Date:
March 20, 1979
Filing Date:
August 29, 1977
Export Citation:
International Classes:
G04G13/02; G04C3/00; G04C3/14; G04C21/00; G04G13/00; (IPC1-7): G04C21/00; G04C3/00
Domestic Patent References:
| JP49099263B |