Document Type and Number:
Japanese Patent JPH0417898
Kind Code:
Y2
Application Number:
JP8217687U
Publication Date:
April 21, 1992
Filing Date:
May 30, 1987
Export Citation:
International Classes:
F16L39/00; F16L37/00; F16L39/04; (IPC1-7): F16L39/00
Next Patent: JPH0417899