Document Type and Number:
Japanese Patent JPS63143493
Kind Code:
U
Application Number:
JP3666887U
Publication Date:
September 21, 1988
Filing Date:
March 12, 1987
Export Citation:
International Classes:
B63B39/06; B63B41/00; B63H16/20; (IPC1-7): B63H16/20; B63B39/06; B63B41/00
Domestic Patent References:
| JPS498995B1 | 1974-03-01 | |||
| JPS61119489A | 1986-06-06 |