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Smoke detector tester
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Patent number 10,783,771
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Issue date Sep 22, 2020
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Thorn Security Limited
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Stephen Penney
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B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
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Chamberless smoke detector
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Patent number 10,580,277
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Issue date Mar 3, 2020
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JOHNSON CONTROLS FIRE PROTECTION LP
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Stephen J. Penney
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G08 - SIGNALLING
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Particulate detector
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Patent number 8,559,006
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Issue date Oct 15, 2013
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Thorn Security Limited
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Stephen John Penney
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F21 - LIGHTING
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Detector
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Patent number 8,154,415
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Issue date Apr 10, 2012
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SimplexGrinnell LP
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Stephen John Penney
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G08 - SIGNALLING
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Smoke detector
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Patent number 7,940,190
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Issue date May 10, 2011
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Thorn Security Limited
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Stephen John Penney
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G08 - SIGNALLING
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Detection arrangements
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Patent number 7,843,324
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Issue date Nov 30, 2010
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Thorn Security Limited
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Stephen John Penney
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G08 - SIGNALLING
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Fire detector
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Patent number 7,106,187
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Issue date Sep 12, 2006
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Thorn Security Limited
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Steve J. Penney
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G08 - SIGNALLING
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Amplification circuits
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Patent number 6,188,278
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Issue date Feb 13, 2001
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Thorn Security Limited
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Stephen John Penney
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G01 - MEASURING TESTING