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Detecting leaks
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Patent number 4,580,443
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Issue date Apr 8, 1986
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BL Technology Limited
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Peter E. G. Marshall
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G01 - MEASURING TESTING
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Detecting leaks
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Patent number 4,577,489
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Issue date Mar 25, 1986
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BL Technology Limited
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Peter E. G. Marshall
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G01 - MEASURING TESTING
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Detecting leaks
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Patent number 4,577,490
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Issue date Mar 25, 1986
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BL Technology Limited
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David J. Bray
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G01 - MEASURING TESTING
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Constant mesh gearboxes
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Patent number 4,528,861
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Issue date Jul 16, 1985
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BL Technology Limited
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Peter W. R. Stubbs
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Fluid flow control valve
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Patent number 4,505,293
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Issue date Mar 19, 1985
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BL Technology Limited
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Victor E. Strange
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G05 - CONTROLLING REGULATING
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