Title:
【考案の名称】断熱二重管
Document Type and Number:
Japanese Patent JPH04111995
Kind Code:
U
Inventors:
Yoshihiko Yamamoto
Application Number:
JP2441591U
Publication Date:
September 29, 1992
Filing Date:
March 18, 1991
Export Citation:
International Classes:
F16L59/10; F16L21/02; F16L59/14; (IPC1-7): F16L59/10; F16L59/14
Domestic Patent References:
| JPS56151989A | 1981-11-25 | |||
| JPS526779A | 1977-01-19 | |||
| JPS55103195A | 1980-08-07 |