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Pressure transducer
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Patent number 4,321,578
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Issue date Mar 23, 1982
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Hitachi, Ltd.
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Akira Nagasu
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G01 - MEASURING TESTING
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Pressure transducer
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Patent number 4,264,889
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Issue date Apr 28, 1981
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Hitachi, Ltd.
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Yoshimi Yamamoto
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G01 - MEASURING TESTING
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Semiconductor transducer
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Patent number 4,166,384
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Issue date Sep 4, 1979
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Hitachi, Ltd.
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Yasumasa Matsuda
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G01 - MEASURING TESTING