Inventor

JOHNSTON DEREK SCOTT

US3 patents

Patents

3 patents

US6426703B1Jul 30, 2002

Carbon monoxide and smoke detection apparatus

BRK BRANDS INC79 citations94

US6819252B2Nov 16, 2004

Carbon monoxide and smoke detection apparatus

BRK BRANDS INC51 citations92

US6762688B2Jul 13, 2004

Device with silencing circuitry

BRK BRANDS INC25 citations86