Document Type and Number:
Japanese Patent JPS4947177
Kind Code:
B1
Application Number:
JP9554969A
Publication Date:
December 14, 1974
Filing Date:
November 28, 1969
Export Citation:
International Classes:
G03B31/04; H02P7/295; H02P29/00
Domestic Patent References:
| JPS3729182Y1 |