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Optical phase modulator
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Patent number 5,029,978
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Issue date Jul 9, 1991
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GEC-Marconi Limited
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Alan C. Curtis
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G02 - OPTICS
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Hydrophone
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Patent number 4,998,226
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Issue date Mar 5, 1991
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GEC-Marconi Limited
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Michael L. Henning
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G01 - MEASURING TESTING
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Optical sensing systems
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Patent number 4,956,549
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Issue date Sep 11, 1990
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Plessey Overseas Limited
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Michael L. Henning
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G01 - MEASURING TESTING
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Optical sensing systems
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Patent number 4,653,916
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Issue date Mar 31, 1987
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Plessey Overseas Limited
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Michael L. Henning
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G01 - MEASURING TESTING