Inventor
SHUTOKU RYUJI
JP4 patents
Patents
4 patentsUS5151683ASep 29, 1992
Power supply control device in fire alarm system
NOHMI BOSAI LTD67 citations94
US4996518AFeb 26, 1991
Fire alarm system
NOHMI BOSAI LTD97 citations91
US5086293AFeb 4, 1992
Line interruption supervisory device for a fire alarm system
NOHMI BOSAI LTD10 citations71
US5083107AJan 21, 1992
Fire alarm system
NOHMI BOSAI LTD9 citations71