Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1980-07-03
1983-01-11
Blum, Theodore M.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
310329, H04R 1700
Patent
active
043685250
ABSTRACT:
A vibration detector of the seismic system comprises
REFERENCES:
patent: 2880333 (1959-03-01), Dranetz
patent: 3158831 (1964-11-01), Boyer
patent: 3241373 (1966-03-01), Ricketts et al.
patent: 4051395 (1977-09-01), Taylor
patent: 4183010 (1980-01-01), Miller
Fujii Teruo
Murayama Naohiro
Obata Sukiro
Blum Theodore M.
Kureha Kagaku Kogyo Kabushiki Kaisha
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