Inventor
Tetsuya Nagashima
Inventor
Tokyo, JP
Overview
Patents· 18 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G08Bprimary
G08BSignalling systems, e.g. personal calling systems71%
G01KMeasuring temperature8%
G01NInvestigating or analysing materials by determining their chemical or physical properties8%
C11DDetergent compositions4%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light4%
H01GCapacitors4%
PatentTitleYear
8,773,272'Light scattering type smoke detector'20147,896,544'Heat detector and method of manufacturing heat detecting element'20117,802,918'Heat detector'20107,746,239'Light scattering type smoke detector'20105,859,706'Photoelectric smoke detector and disaster monitoring system using the photoelectric smoke detector'19995,670,947'Light scattering smoke sensor'19975,642,099'Light scattering type smoke detector'19975,587,790'Light scattering type smoke detector having an improved zero-point level'19965,576,697'Fire alarm system'19965,502,434'Smoke sensor'19965,497,009'Photoelectric smoke sensor and fire detecting system, and sensitivity testing method therefor'19965,430,307'Light scattering smoke detector with smoke-entrance ladyrinth designed to prevent false signals due to reflection'19955,280,272'Fire alarm system which distinguishes between different types of smoke'19944,914,425'Highly sensitive smoke detector'19904,884,222'Fire alarm system'19894,644,331'Fire alarm system'19874,596,465'Scattered light type smoke detector'19864,273,684'Transparent detergent bar'1981Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1981Patents assigned to AJINOMOTO KK (1)· patent assignee history
1981Based in Ogose, JP· patent location history
1986–2014Patents assigned to HOCHIKI CO (15)· patent assignee history
1986–2014Based in Tokyo, JP· patent location history
1989–2014Patents assigned to NAGASHIMA TETSUYA (2)· patent assignee history
1989Patents assigned to KITAJIMA AKIRA (1)· patent assignee history
1994–1997Based in Sagamihara, JP· patent location history
1996Patents assigned to HOCKIKI KABUSHIKI KAISHA (1)· patent assignee history
1999Based in Kawachinagano, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HOCHIKI CO | 15 | 1986–2014 |
| NAGASHIMA TETSUYAself | 2 | 1989–2014 |
| AJINOMOTO KK | 1 | 1981 |
| HOCKIKI KABUSHIKI KAISHA | 1 | 1996 |
| KITAJIMA AKIRA | 1 | 1989 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 12 | 1986–2014 |
| Sagamihara, JP | 4 | 1994–1997 |
| Kawachinagano, JP | 1 | 1999 |
| Ogose, JP | 1 | 1981 |