Document Type and Number:
Japanese Patent JPS5089821
Kind Code:
U
Application Number:
JP218674U
Publication Date:
July 30, 1975
Filing Date:
December 22, 1973
Export Citation:
International Classes:
A01C11/02; (IPC1-7): A01C11/02
Domestic Patent References:
| JPS4722516A |
Foreign References:
| US3181559A | 1965-05-04 |