Document Type and Number:
Japanese Patent JPS56171491
Kind Code:
U
Application Number:
JP7001080U
Publication Date:
December 18, 1981
Filing Date:
May 21, 1980
Export Citation:
International Classes:
F16L29/00; (IPC1-7): F16L29/00
Domestic Patent References:
| JPS5040990B2 | 1975-12-27 | |||
| JPS3018066Y1 | ||||
| JPS5317940B2 | 1978-06-12 |