Document Type and Number:
Japanese Patent JPS4974137
Kind Code:
U
Application Number:
JP12048772U
Publication Date:
June 27, 1974
Filing Date:
October 17, 1972
Export Citation:
International Classes:
H01J29/82; H01J29/76; (IPC1-7): H01J29/76
Domestic Patent References:
| JPS4515123Y1 | 1970-06-25 | |||
| JPS483379U | 1973-01-16 |