Inventor
NAGASHIMA TETSUYA
JP20 patents
⚠️ This page may combine multiple inventors who share the name “NAGASHIMA TETSUYA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HOCHIKI CO
15 patentsUS5576697ANov 19, 1996
Fire alarm system
HOCHIKI CO100 citations94
US5280272AJan 18, 1994
Fire alarm system which distinguishes between different types of smoke
HOCHIKI CO71 citations94
US7746239B2Jun 29, 2010
Light scattering type smoke detector
HOCHIKI CO32 citations92
US5642099AJun 24, 1997
Light scattering type smoke detector
HOCHIKI CO20 citations92
US5587790ADec 24, 1996
Light scattering type smoke detector having an improved zero-point level
HOCHIKI CO23 citations92
US5430307AJul 4, 1995
Light scattering smoke detector with smoke-entrance ladyrinth designed to prevent false signals due to reflection
HOCHIKI CO24 citations92
US5497009AMar 5, 1996
Photoelectric smoke sensor and fire detecting system, and sensitivity testing method therefor
HOCHIKI CO31 citations91
US4644331AFeb 17, 1987
Fire alarm system
HOCHIKI CO32 citations86
US5670947ASep 23, 1997
Light scattering smoke sensor
HOCHIKI CO18 citations84
US7896544B2Mar 1, 2011
Heat detector and method of manufacturing heat detecting element
HOCHIKI CO9 citations82
US4596465AJun 24, 1986
Scattered light type smoke detector
HOCHIKI CO25 citations82
US4914425AApr 3, 1990
Highly sensitive smoke detector
HOCHIKI CO10 citations72
US5859706AJan 12, 1999
Photoelectric smoke detector and disaster monitoring system using the photoelectric smoke detector
HOCHIKI CO16 citations71
US11694532B2Jul 4, 2023
Fire alarm equipment
HOCHIKI CO0 citations52
US7802918B2Sep 28, 2010
Heat detector
HOCHIKI CO1 citations51