Document Type and Number:
Japanese Patent JPH043381
Kind Code:
U
Application Number:
JP4380590U
Publication Date:
January 13, 1992
Filing Date:
April 24, 1990
Export Citation:
International Classes:
G04B37/16; G04B37/18; (IPC1-7): G04B37/16; G04B37/18
Next Patent: JPH043382