Title:
REDUCING NOISE OF ULTRALOW FREQUENCY DUE TO HIGHHWAY BRIDGE
Document Type and Number:
Japanese Patent JPS55142399
Kind Code:
A
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Inventors:
NISHIWAKI JINICHI
Application Number:
JP4906579A
Publication Date:
November 06, 1980
Filing Date:
April 23, 1979
Export Citation:
Assignee:
NISHIWAKI JINICHI
International Classes:
E01D1/00; E01C1/00; G10K11/16; G10K11/178; (IPC1-7): E01C1/00; E01D1/00; G10K11/16
Domestic Patent References:
| JPS5248206B2 | 1977-12-08 | |||
| JPS5238886B2 | 1977-10-01 |