Derek Johnston

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Aurora, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Electrochemical carbon monoxide sensor supervision
- Patent number 8,066,859
- Issue date Nov 29, 2011
- BRK Brands, Inc.
- Derek Johnston
- G01 - MEASURING TESTING
Information Patent Grant
Wireless linking of smoke/CO detection units
- Patent number 7,417,540
- Issue date Aug 26, 2008
- BRK Brands, Inc.
- Derek Johnston
- G08 - SIGNALLING
Information Patent Grant
Power supply and interconnect detector system
- Patent number 7,009,521
- Issue date Mar 7, 2006
- BRK Brands, Inc.
- Floyd E. Brooks
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Carbon monoxide and smoke detection apparatus
- Patent number 6,819,252
- Issue date Nov 16, 2004
- BRK Brands, Inc.
- Derek Scott Johnston
- G08 - SIGNALLING
Information Patent Grant
Device with silencing circuitry
- Patent number 6,762,688
- Issue date Jul 13, 2004
- BRK Brands, Inc.
- Derek Scott Johnston
- G08 - SIGNALLING
Information Patent Grant
Modular detector system
- Patent number 6,731,207
- Issue date May 4, 2004
- BRK Brands, Inc.
- Michael A. Swieboda
- G08 - SIGNALLING
Information Patent Grant
Carbon monoxide and smoke detection apparatus
- Patent number 6,426,703
- Issue date Jul 30, 2002
- BRK Brands, Inc.
- Derek Scott Johnston
- G08 - SIGNALLING

Patents Applicationslast 30 patents

Information Patent Application
ELECTROCHEMICAL CARBON MONOXIDE SENSOR SUPERVISION
- Publication number 20090107838
- Publication date Apr 30, 2009
- Derek Johnston
- G01 - MEASURING TESTING
Information Patent Application
Wireless linking of smoke/CO detection units
- Publication number 20070241876
- Publication date Oct 18, 2007
- Derek Johnston
- G08 - SIGNALLING
Information Patent Application
Modular detector system
- Publication number 20040257226
- Publication date Dec 23, 2004
- BRK Brands, Inc.
- Michael A. Swieboda
- G08 - SIGNALLING
Information Patent Application
Environmental condition alarm with voice enunciation
- Publication number 20030146833
- Publication date Aug 7, 2003
- Derek Scott Johnston
- G08 - SIGNALLING
Information Patent Application
Device with silencing circuitry
- Publication number 20020130782
- Publication date Sep 19, 2002
- Derek Scott Johnston
- G08 - SIGNALLING
Information Patent Application
Power supply and interconnect system
- Publication number 20020070857
- Publication date Jun 13, 2002
- Floyd E. Brooks
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Carbon monoxide and smoke detection apparatus
- Publication number 20020044061
- Publication date Apr 18, 2002
- BRK Brands, Inc.
- Derek Scott Johnston
- G01 - MEASURING TESTING