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Gas sensing assembly
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Patent number 5,624,641
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Issue date Apr 29, 1997
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SEM Corporation
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Constantine D. Capetanopolous
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G01 - MEASURING TESTING
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Gas sensor
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Patent number D362811
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Issue date Oct 3, 1995
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SEM Corporation
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Constantine D. Capetanopolous
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D10 - Measuring, testing, or signalling instruments
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Gas diffusion control assembly
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Patent number 5,321,971
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Issue date Jun 21, 1994
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The Governor and Company of the Bank of Scotland
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Bryan S. Hobbs
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G01 - MEASURING TESTING
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Gas sensor
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Patent number 5,234,567
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Issue date Aug 10, 1993
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City Technology Limited
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Bryan S. Hobbs
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G01 - MEASURING TESTING
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Gas sensor
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Patent number 4,474,648
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Issue date Oct 2, 1984
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City Technology Limited
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Anthony D. S. Tantram
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G01 - MEASURING TESTING
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Gas sensor
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Patent number 4,406,770
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Issue date Sep 27, 1983
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Coal Industry (Patents) Limited
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Yat S. Chan
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G01 - MEASURING TESTING