Document Type and Number:
Japanese Patent JPS4929971
Kind Code:
U
Application Number:
JP7118372U
Publication Date:
March 14, 1974
Filing Date:
June 15, 1972
Export Citation:
International Classes:
G01R22/02; (IPC1-7): G01R11/44
Domestic Patent References:
| JPS448556Y1 | 1969-04-04 |
Foreign References:
| US3423648A | 1969-01-21 |