Document Type and Number:
Japanese Patent JPS577275
Kind Code:
U
Application Number:
JP8282880U
Publication Date:
January 14, 1982
Filing Date:
June 13, 1980
Export Citation:
International Classes:
H04R1/00; G01N29/04; G01N29/28; (IPC1-7): H04R1/00; G01N29/04
Domestic Patent References:
| JPS5544272U | 1980-03-22 |
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