Document Type and Number:
Japanese Patent JPS4917351
Kind Code:
U
Application Number:
JP5915572U
Publication Date:
February 14, 1974
Filing Date:
May 19, 1972
Export Citation:
International Classes:
B61B13/04; A63B55/60; E01B25/08; (IPC1-7): A63B55/08
Domestic Patent References:
| JP45020325A |
Foreign References:
| US3610162A | 1971-10-05 |