for detecting light-scattering due to smoke

Introduced: January 1990

Last revised: January 2006

Full Title

Fire alarms; Alarms responsive to explosion > Actuation by presence of smoke or gases > using a light emitting and receiving device > for detecting light-scattering due to smoke

Classification Context

Section:: PHYSICS
Class:: SIGNALLING
Subclass:: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS

Top Applicants

Top 10 applicants by patent filingsfor class G08, 2013–2023, worldwide · Source: EPO PATSTAT

TOYOTA MOTOR CORPORATION 6,781
SGCC(STATE GRID CORPORATION OF CHINA) 5,954
ROBERT BOSCH DE 3,656
DENSO CORPORATION 3,452
HONDA MOTOR COMPANY 2,945
DENSO CORPORATION JP 2,562
HONEYWELL INTERNATIONAL US 2,517
TOYOTA MOTOR CORPORATION JP 2,435
FORD GLOBAL TECHNOLOGIES US 2,239
PANASONIC INTELLECTUAL PROPERTY 2,119