Inventor

Keiko Kumagai

Inventor

Minamiminowa-mura, JP

Overview

5→

Patents

2001–2011

Patent span

Electricity

Primary field (CPC H)

Patents· 5 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G02Fprimary

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein27%

H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light27%

H04NPictorial communication, e.g. television27%

H04LTransmission of digital information, e.g. telegraphic communication9%

H04MTelephonic communication9%

PatentTitleYear

7,899,094'Laser light source device, illumination device, image display device, and monitor device'2011 7,817,334'Wavelength conversion element, light source device, image display device, and monitor device'2010 7,561,612'Laser source device, image display device equipped with the laser source device, and monitor device'2009 7,561,604'Laser light source device, illumination device, image display device, and monitor device'2009 6,205,156'Method and device for data transmission and reception using transmission pause state as reception timing'2001

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2001Patents assigned to NIPPON TELEGRAPH & TELEPHONE (1)· patent assignee history

2001Based in Kanagawa, JP· patent location history

2009–2011Patents assigned to SEIKO EPSON CORP (4)· patent assignee history

2009–2011Based in Minamiminowa-mura, JP· patent location history

2009Based in Suwa, JP· patent location history

2010Based in Minamiminewa-village, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SEIKO EPSON CORP	4	2009–2011
NIPPON TELEGRAPH & TELEPHONE	1	2001

Locations

Location	Patents	Span
Minamiminowa-mura, JP	2	2009–2011
Minamiminewa-village, JP	1	2010
Suwa, JP	1	2009
Kanagawa, JP	1	2001